Last data update: Jan 13, 2025. (Total: 48570 publications since 2009)
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The respiratory syncytial virus vaccine and monoclonal antibody landscape: the road to global access
Terstappen J , Hak SF , Bhan A , Bogaert D , Bont LJ , Buchholz UJ , Clark AD , Cohen C , Dagan R , Feikin DR , Graham BS , Gupta A , Haldar P , Jalang'o R , Karron RA , Kragten L , Li Y , Löwensteyn YN , Munywoki PK , Njogu R , Osterhaus A , Pollard AJ , Nazario LR , Sande C , Satav AR , Srikantiah P , Stein RT , Thacker N , Thomas R , Bayona MT , Mazur NI . Lancet Infect Dis 2024 Respiratory syncytial virus (RSV) is the second most common pathogen causing infant mortality. Additionally, RSV is a major cause of morbidity and mortality in older adults (age ≥60 years) similar to influenza. A protein-based maternal vaccine and monoclonal antibody (mAb) are now market-approved to protect infants, while an mRNA and two protein-based vaccines are approved for older adults. First-year experience protecting infants with nirsevimab in high-income countries shows a major public health benefit. It is expected that the RSV vaccine landscape will continue to develop in the coming years to protect all people globally. The vaccine and mAb landscape remain active with 30 candidates in clinical development using four approaches: protein-based, live-attenuated and chimeric vector, mRNA, and mAbs. Candidates in late-phase trials aim to protect young infants using mAbs, older infants and toddlers with live-attenuated vaccines, and children and adults using protein-based and mRNA vaccines. This Review provides an overview of RSV vaccines highlighting different target populations, antigens, and trial results. As RSV vaccines have not yet reached low-income and middle-income countries, we outline urgent next steps to minimise the vaccine delay. |
Sexual and nonsexual violence and mental health among male refugees from the Democratic Republic of Congo residing in Kampala, Uganda: a population-based survey
Hladik W , Nasirumbi Muniina P , Familiar I , Kaiser P , Ogwal M , Serwadda D , Sande E , Kiyingi H , Siya Bahinduka C , Dolan C . Med Confl Surviv 2023 39 (4) 1-23 We conducted a population-based survey in 2013 in Kampala, Uganda, to examine violence and mental health outcomes among self-settled male refugees from the Eastern Democratic Republic of Congo (DRC). Male DRC refugees aged 18+ years were sampled through respondent-driven sampling. Key interview domains included demographics, experiences of sexual and nonsexual violence, social support, PTSD, depression and suicide ideation. Data analysis was weighted to generate population-level estimates. We sampled 718 men (mean age: 33 years), most of whom had lived in North or South Kivu. Nonsexual violence, such as beatings (79.4%) and torture (63.8%), was frequent. A quarter (26.2%) had been raped; 49.9% of rape victims had been raped on multiple occasions, and 75.7% of rape victims had been gang raped. We estimated 52.8% had post-traumatic stress disorder (PTSD); 44.4% reported suicidal ideation. Numerous traumas were significantly (p < 0.05) associated with PTSD such as rape (adjusted odds ratio [aOR] = 1.82), war-related injuries (aOR = 2.90) or having been exposed to >15 traumas (compared to ≤10; aOR = 6.89). Traumata are frequent experiences in this self-settled male refugee population and are often accompanied by adverse mental health outcomes. Screening for trauma and adverse mental health outcomes and providing targeted services are paramount to improve these refugees' lives. |
At the intersection of sexual and reproductive health and HIV services: use of moderately effective family planning among female sex workers in Kampala, Uganda
Hakim AJ , Ogwal M , Doshi RH , Kiyingi H , Sande E , Serwadda D , Musinguzi G , Standish J , Hladik W . BMC Pregnancy Childbirth 2022 22 (1) 646 BACKGROUND: Female sex workers are vulnerable to HIV, sexually transmitted diseases, and unintended pregnancies; however, the literature on female sex workers (FSW) focuses primarily on HIV and is limited regarding these other health issues. METHODS: We conducted a respondent-driven sampling (RDS) survey during April-December 2012 to characterize the reproductive health of and access to contraceptives FSW in Kampala, Uganda. Eligibility criteria included age15years, residence in greater Kampala, and having sold sex to men in6months. Data were analyzed using RDS-Analyst. Survey logistic regression was used in SAS. RESULTS: We enrolled 1,497 FSW with a median age of 27years. Almost all FSW had been pregnant at least once. An estimated 33.8% of FSW were currently not using any form of family planning (FP) to prevent pregnancy; 52.7% used at least moderately effective FP. Among those using FP methods, injectable contraception was the most common form of FP used (55.4%), followed by condoms (19.7%), oral contraception (18.1%), and implants (3.7%). HIV prevalence was 31.4%, syphilis prevalence was 6.2%, and 89.8% had at least one symptom of a sexually transmitted disease in the last six months. Using at least a moderately effective method of FP was associated with accessing sexually transmitted disease treatment in a stigma-free environment in the last six months (aOR: 1.6, 95% CI: 1.1-2.4), giving birth to 2-3 children (aOR: 2.5, 95% CI: 1.4-4.8) or 4-5 children (aOR: 2.9, 95% CI: 1.4-5.9). It is plausible that those living with HIV are also less likely than those without it to be using a moderately effective method of FP (aOR: 0.7, 95% CI: 0.5-1.0). CONCLUSIONS: The provision of integrated HIV and sexual and reproductive health services in a non-stigmatizing environment has the potential to facilitate increased health service uptake by FSW and decrease missed opportunities for service provision. |
Reaching 95-95-95 targets: The role of private sector health facilities in closing the HIV detection gap-Kisumu Kenya, 2018
Onyango D , McHembere W , Agaya J , Wang A , Cain KP , Grobbee DE , van der Sande MA , Baker B , Yuen CM . Int J STD AIDS 2022 33 (5) 9564624221076953 BACKGROUND: HIV testing efficiency could be improved by focusing on high yield populations and identifying types of health facilities where people with undiagnosed HIV infection are more likely to attend. METHODS: A retrospective cohort analysis of data collected during an integrated TB/HIV active case-finding intervention in Western Kenya. Data were analyzed from health facilities' registers on individuals who reported TB-suggestive symptoms between 1 July and 31 December 2018 and who had an HIV test result within one month following symptom screening. We used logistic regression with general estimating equations adjusting for sub-county level data to identify health facility-level predictors of new HIV diagnoses. RESULTS: Of 11,376 adults with presumptive TB identified in 143 health facilities, 1038 (9%) tested HIV positive. The median HIV positivity per health facility was 6% (IQR = 2-15%). Patients with TB symptoms were over three times as likely to have a new HIV diagnosis in private not-for-profit facilities compared to those in government facilities (adjusted odds ratio (aOR) 3.40; 95% CI = 1.96-5.90). Patients tested in hospitals were over two times as likely to have a new HIV diagnosis as those tested in smaller facilities (i.e., health centers and dispensaries) (aOR 2.26; 95% CI = 1.60-3.21). CONCLUSION: Individuals with presumptive TB who attended larger health facilities and private not-for-profit facilities had a higher likelihood of being newly diagnosed with HIV. Strengthening HIV services at these facilities and outreach to populations that use them could help to close the HIV diagnosis gap. |
Leading causes of death and high mortality rates in an HIV endemic setting (Kisumu county, Kenya, 2019)
Waruru A , Onyango D , Nyagah L , Sila A , Waruiru W , Sava S , Oele E , Nyakeriga E , Muuo SW , Kiboye J , Musingila PK , van der Sande MAB , Massawa T , Rogena EA , DeCock KM , Young PW . PLoS One 2022 17 (1) e0261162 BACKGROUND: In resource-limited settings, underlying causes of death (UCOD) often are not ascertained systematically, leading to unreliable mortality statistics. We reviewed medical charts to establish UCOD for decedents at two high volume mortuaries in Kisumu County, Kenya, and compared ascertained UCOD to those notified to the civil registry. METHODS: Medical experts trained in COD certification examined medical charts and ascertained causes of death for 456 decedents admitted to the mortuaries from April 16 through July 12, 2019. Decedents with unknown HIV status or who had tested HIV-negative >90 days before the date of death were tested for HIV. We calculated annualized all-cause and cause-specific mortality rates grouped according to global burden of disease (GBD) categories and separately for deaths due to HIV/AIDS and expressed estimated deaths per 100,000 population. We compared notified to ascertained UCOD using Cohen's Kappa (κ) and assessed for the independence of proportions using Pearson's chi-squared test. FINDINGS: The four leading UCOD were HIV/AIDS (102/442 [23.1%]), hypertensive disease (41/442 [9.3%]), other cardiovascular diseases (23/442 [5.2%]), and cancer (20/442 [4.5%]). The all-cause mortality rate was 1,086/100,000 population. The highest cause-specific mortality was in GBD category II (noncommunicable diseases; 516/100,000), followed by GBD I (communicable, perinatal, maternal, and nutritional; 513/100,000), and III (injuries; 56/100,000). The HIV/AIDS mortality rate was 251/100,000 population. The proportion of deaths due to GBD II causes was higher among females (51.9%) than male decedents (42.1%; p = 0.039). Conversely, more men/boys (8.6%) than women/girls (2.1%) died of GBD III causes (p = 0.002). Most of the records with available recorded and ascertained UCOD (n = 236), 167 (70.8%) had incorrectly recorded UCOD, and agreement between notified and ascertained UCOD was poor (29.2%; κ = 0.26). CONCLUSIONS: Mortality from infectious diseases, especially HIV/AIDS, is high in Kisumu County, but there is a shift toward higher mortality from noncommunicable diseases, possibly reflecting an epidemiologic transition and improving HIV outcomes. The epidemiologic transition suggests the need for increased focus on controlling noncommunicable conditions despite the high communicable disease burden. The weak agreement between notified and ascertained UCOD could lead to substantial inaccuracies in mortality statistics, which wholly depend on death notifications. |
Positive influences and challenges for the deaf community navigating access to HIV information, testing, and treatment in Kampala, Uganda: A qualitative study
Rolle IV , Moyer A , Ogwal M , Logan N , Rogers J , Sande E , Kibalama R , Aluzimbi G , Nyende J , Awoii P , Julliet D , Serwada D , Hladik W . AIDS Behav 2021 26 (4) 1222-1228 Although sub-Saharan Africa has the highest HIV burden globally, few studies have investigated disabilities and HIV in this region. We conducted a secondary analysis of text data from in-depth interviews (2014-2015) to describe HIV perceptions among a subsample of 73 deaf individuals participating in the Crane survey, Kampala, Uganda. Being deaf was defined as being profoundly or functionally deaf, having deafness onset 5 + years ago, and preferring sign language to communicate. Among participants ever tested for HIV (47%), most (88%) had a negative test. Thematic analysis revealed overcoming challenges/barriers followed by socioeconomic status, support systems, HIV, stigma, abuse, and health conditions as major themes. An unanticipated finding was the role of sex work to support basic living needs. The data showed related themes among participants, suggesting a complex context in which deaf participants experience HIV prevention and treatment. It is important to tailor HIV interventions for deaf and disabled persons. |
Causes of death in HIV-infected and HIV-uninfected children in the child health and mortality prevention surveillance study-Kenya
Onyango DO , Akelo V , van der Sande MAB , Ridzon R , Were JA , Agaya JA , Oele EA , Wandiga S , Igunza AK , Young PW , Blau DM , Joseph RH , Yuen CM , Zielinski-Gutierrez E , Tippet-Barr BA . AIDS 2021 36 (1) 59-68 OBJECTIVES: Describe the causes of death among infants and children <5 years stratified by HIV status. DESIGN: Cross-sectional analysis of causes of death ascertained through minimally invasive tissue sampling (MITS) in the Kenya Child Health and Mortality Prevention Surveillance site. METHODS: We included decedents aged 28 days to <5 years, whose death was reported within 36 hours, underwent MITS, and had HIV test results and causes of death determined. MITS specimens were tested using Taqman Array Cards, culture, cytology, histopathology and immunohistochemistry and HIV polymerase chain reaction. A panel evaluated epidemiologic, clinical, verbal autopsy and laboratory data to assign causes of death using ICD10 guidelines. Causes of death and etiological agents were stratified by HIV status. RESULTS: Of 176 included decedents, 14% (n = 25) were HIV-infected, median viral load was 112,205 copies per milliliter (interquartile range [IQR] = 9,349-2,670,143). HIV-disease (96%; n = 24) and malnutrition (23%; n = 34) were the leading underlying causes of death in HIV-infected and HIV-uninfected decedents, respectively. Malnutrition was more frequent in the causal chain of HIV-infected (56%; n = 14) than HIV-uninfected decedents (31%; n = 49) (p-value = 0.03). Viral pneumonia was twice as common in HIV-infected (50%; n = 9) than HIV-uninfected decedents (22%; n = 7) (p-value = 0.04). CONCLUSION: Nearly all HIV-infected decedents' underlying cause of death was HIV disease which was associated with malnutrition. Our findings underscore the need for strengthening early identification and management of HIV-infected children. Prevention, early diagnosis and treatment of malnutrition could be instrumental in improving the survival of HIV-infected and HIV-uninfected children. |
High HIV prevalence among decedents received by two high-volume mortuaries in Kisumu, western Kenya, 2019
Onyango DO , van der Sande MAB , Musingila P , Kinywa E , Opollo V , Oyaro B , Nyakeriga E , Waruru A , Waruiru W , Mwangome M , Macharia T , Young PW , Junghae M , Ngugi C , De Cock KM , Rutherford GW . PLoS One 2021 16 (7) e0253516 BACKGROUND: Accurate data on HIV-related mortality are necessary to evaluate the impact of HIV interventions. In low- and middle-income countries (LMIC), mortality data obtained through civil registration are often of poor quality. Though not commonly conducted, mortuary surveillance is a potential complementary source of data on HIV-associated mortality. METHODS: During April-July 2019, we assessed HIV prevalence, the attributable fraction among the exposed, and the population attributable fraction among decedents received by two high-volume mortuaries in Kisumu County, Kenya, where HIV prevalence in the adult population was estimated at 18% in 2019 with high ART coverage (76%). Stillbirths were excluded. The two mortuaries receive 70% of deaths notified to the Kisumu East civil death registry; this registry captures 45% of deaths notified in Kisumu County. We conducted hospital chart reviews to determine the HIV status of decedents. Decedents without documented HIV status, including those dead on arrival, were tested using HIV antibody tests or polymerase chain reaction (PCR) consistent with national HIV testing guidelines. Decedents aged less than 15 years were defined as children. We estimated annual county deaths by applying weights that incorporated the study period, coverage of deaths, and mortality rates observed in the study. RESULTS: The two mortuaries received a total of 1,004 decedents during the study period, of which 95.1% (955/1004) were available for study; 89.1% (851/955) of available decedents were enrolled of whom 99.4% (846/851) had their HIV status available from medical records and post-mortem testing. The overall population-based, age- and sex-adjusted mortality rate was 12.4 per 1,000 population. The unadjusted HIV prevalence among decedents was 28.5% (95% confidence interval (CI): 25.5-31.6). The age- and sex-adjusted mortality rate in the HIV-infected population (40.7/1000 population) was four times higher than in the HIV-uninfected population (10.2/1000 population). Overall, the attributable fraction among the HIV-exposed was 0.71 (95% CI: 0.66-0.76) while the HIV population attributable fraction was 0.17 (95% CI: 0.14-0.20). In children the attributable fraction among the exposed and population attributable fraction were 0.92 (95% CI: 0.89-0.94) and 0.11 (95% CI: 0.08-0.15), respectively. CONCLUSIONS: Over one quarter (28.5%) of decedents received by high-volume mortuaries in western Kenya were HIV-positive; overall, HIV was considered the cause of death in 17% of the population (19% of adults and 11% of children). Despite substantial scale-up of HIV services, HIV disease remains a leading cause of death in western Kenya. Despite progress, increased efforts remain necessary to prevent and treat HIV infection and disease. |
Conflict-related violence and mental health among self-settled Democratic Republic of Congo female refugees in Kampala, Uganda - a respondent driven sampling survey
Familiar I , Muniina PN , Dolan C , Ogwal M , Serwadda D , Kiyingi H , Bahinduka CS , Sande E , Hladik W . Confl Health 2021 15 (1) 42 BACKGROUND: Violence and traumatic events are highly prevalent among refugees, but less is known about the impact of these experiences among self-settled refugees in the country of asylum. We evaluated the association between traumatic experiences and PTSD and depression symptoms among female Democratic Republic of Congo (DRC) refugees living in Kampala, Uganda. METHODS: Participants were recruited using respondent driven sampling in one refugee service center in Kampala, Uganda. Eligibility criteria included: Congolese nationality, age 18+ years, self-settled in Kampala for at least 6 months, refugee status or documentation of application for refugee status. Only data from female participants were included in this analysis. Depression symptoms were screened with the Patient Health Questionnaire-2, and symptom criteria for PTSD and traumatic experiences were evaluated with the Harvard Trauma Questionnaire. Logistic regression models were performed to separately assess associations between mental health outcomes (PTSD and depression), rape and non-sexual violence. RESULTS: Five hundred eighty women with a mean age of 33 years were interviewed. Among participants, 73% (95% CI:67-78%) met symptom criteria for PTSD, 57% (95% CI: 51-63%) for depression, and 65% reported thoughts of ending one's life. 79% of women reported experience of rape, for over half (54%) it occurred more than once, and 82% were gang raped. Crude and adjusted odds ratios (ORs) show that PTSD was most strongly associated with being raped (OR = 2.43, p < 0.01), lacking shelter (OR = 2.86, p < 0.01), lacking food or water (OR = 2.53, p = 0.02), lacking access to health care (OR = 2.84, p < 0.01), forced labor (OR = 2.6, p < 0.01), extortion and/or robbery (OR = 3.08, p < 0.01), experiencing the disappearance/kidnapping of a family member or friend (OR = 2.72, p < 0.01), and witnessing the killing or murder of other people (OR = 3.28, p < 0.01). Depression was significantly associated with several traumatic experiences including rape (OR = 2.3, p = 0.01), and experiencing the disappearance/kidnapping of a child or spouse (OR = 1.99, p = 0.01). CONCLUSIONS: Refugee women self-settled in Kampala reported high lifetime experiences of violence and traumatic events including rape, as well as high rates of PTSD and depression. Future programming addressing self-settled refugees and their settlement in host countries may benefit from including local and national integration strategies. |
Development of the Global Mycetoma Working Group
Traxler RM , Beer KD , Blaney DD , van de Sande WWJ , Fahal AH , Asiedu KB , Bower WA , Chiller T . Trans R Soc Trop Med Hyg 2020 115 (4) 437-440 The Global Mycetoma Working Group (GMWG) was formed in January 2018 in response to the declaration of mycetoma as a neglected tropical disease (NTD) by the World Health Assembly. The aim of the working group is to connect experts and public health practitioners around the world to accelerate mycetoma prevention activities and reduce the impact of mycetoma on patients, healthcare providers and society in the endemic regions. The working group has made tangible contributions to mycetoma programming, awareness and coordination among scientists, clinicians and public health professionals. The group's connectivity has enabled rapid response and review of NTD documents in development, has created a network of public health professionals to provide regional mycetoma expertise and has enabled mycetoma to be represented within broader NTD organizations. The GMWG will continue to serve as a hub for networking and building collaborations for the advancement of mycetoma clinical management and treatment, research and public health programming. |
Task shifting for initiation and monitoring of antiretroviral therapy for HIV-infected adults in Uganda: The SHARE Trial
Sekiziyivu AB , Bancroft E , Rodriguez EM , Sendagala S , Muniina PN , Sserunga MN , Kiragga NA , Musaazi J , Musinguzi J , Sande E , Bartholow B , Dalal S , Tusiime JB , Kambugu A . J Acquir Immune Defic Syndr 2020 86 (3) e71-e79 BACKGROUND: With countries moving towards the World Health Organization's "Treat All" recommendation, there is need to initiate more HIV-infected persons on antiretroviral therapy (ART). In resource-limited settings, task shifting is one approach that can address clinician shortages. SETTING: Uganda METHODS:: We conducted a randomized controlled trial to test if nurse-initiated and monitored antiretroviral therapy (NIMART) is non-inferior to clinician-initiated and monitored ART (CIMART) in HIV-infected adults in Uganda. Study participants were HIV-infected, ART-naïve, and clinically stable adults. The primary outcome was a composite endpoint of any of the following: all-cause mortality, virological failure, toxicity, and loss to follow up at 12 months post-ART initiation. RESULTS: Over half of the study cohort (1,760) was female (54.9%). The mean age was 35.1 years (standard deviation 9.51). Five hundred and thirty-three (31.6%) participants experienced the composite endpoint. At 12 months post-ART initiation, NIMART was non-inferior to CIMART. The intention-to-treat site-adjusted risk differences for the composite endpoint were -4.1 (97.5% CI = -9.8 to 0.2) with complete case analysis (CCA) and -3.4 (97.5% CI = -9.1 to 2.5) with multiple imputation analysis (MIA). Per-protocol site-adjusted risk differences were -3.6 (97.5% CI = -10.5 to 0.6) for CCA and -3.1 (-8.8 to 2.8) for MIA. This difference was within hypothesized margins (6%) for non-inferiority. CONCLUSIONS: Nurses were non-inferior to clinicians for initiation and monitoring of ART. Task shifting to trained nurses is a viable means to increase access to ART. Future studies should evaluate NIMART for other groups (e.g., children, adolescents, and unstable patients). |
Using geographical data and rolling statistics for diagnostics of respondent-driven sampling
Kim B , Ogwal M , Sande E , Kiyingi H , Serwadda D , Hladik W . Soc Networks 2020 69 74-83 Respondent-driven sampling (RDS) is commonly used to sample from key populations without a sampling frame since traditional methods are unable to efficiently survey them. Surveying these populations is often desirable to inform service delivery, assess effectiveness of programs, and determine prevalence of diseases. However, there are concerns about how RDS works in practice due to its many assumptions. To assess some of these assumptions, we develop diagnostics using geographical data and demonstrate their utility by identifying lack of convergence and characterizing RDS reach in surveys conducted among female sex workers and men who have sex with men in Kampala, Uganda. |
The Diagnosis of Fungal Neglected Tropical Diseases (Fungal NTDs) and the Role of Investigation and Laboratory Tests: An Expert Consensus Report.
Hay R , Denning DW , Bonifaz A , Queiroz-Telles F , Beer K , Bustamante B , Chakrabarti A , Chavez-Lopez MG , Chiller T , Cornet M , Estrada R , Estrada-Chavez G , Fahal A , Gomez BL , Li R , Mahabeer Y , Mosam A , Soavina Ramarozatovo L , Rakoto Andrianarivelo M , Rapelanoro Rabenja F , van de Sande W , Zijlstra EE . Trop Med Infect Dis 2019 4 (4) The diagnosis of fungal Neglected Tropical Diseases (NTD) is primarily based on initial visual recognition of a suspected case followed by confirmatory laboratory testing, which is often limited to specialized facilities. Although molecular and serodiagnostic tools have advanced, a substantial gap remains between the desirable and the practical in endemic settings. To explore this issue further, we conducted a survey of subject matter experts on the optimal diagnostic methods sufficient to initiate treatment in well-equipped versus basic healthcare settings, as well as optimal sampling methods, for three fungal NTDs: mycetoma, chromoblastomycosis, and sporotrichosis. A survey of 23 centres found consensus on the key role of semi-invasive sampling methods such as biopsy diagnosis as compared with swabs or impression smears, and on the importance of histopathology, direct microscopy, and culture for mycetoma and chromoblastomycosis confirmation in well-equipped laboratories. In basic healthcare settings, direct microscopy combined with clinical signs were reported to be the most useful diagnostic indicators to prompt referral for treatment. The survey identified that the diagnosis of sporotrichosis is the most problematic with poor sensitivity across the most widely available laboratory tests except fungal culture, highlighting the need to improve mycological diagnostic capacity and to develop innovative diagnostic solutions. Fungal microscopy and culture are now recognized as WHO essential diagnostic tests and better training in their application will help improve the situation. For mycetoma and sporotrichosis, in particular, advances in identifying specific marker antigens or genomic sequences may pave the way for new laboratory-based or point-of-care tests, although this is a formidable task given the large number of different organisms that can cause fungal NTDs. |
Cervical determinants of anal HPV infection and high-grade anal lesions in women: a collaborative pooled analysis
Lin C , Slama J , Gonzalez P , Goodman MT , Xia N , Kreimer AR , Wu T , Hessol NA , Shvetsov Y , Ortiz AP , Grinsztejn B , Moscicki AB , Heard I , Del Refugio Gonzalez Losa M , Kojic EM , Schim van der Loeff MF , Wei F , Longatto-Filho A , Mbulawa ZA , Palefsky JM , Sohn AH , Hernandez BY , Robison K , Simpson SJr , Conley LJ , de Pokomandy A , van der Sande MAB , Dube Mandishora RS , Volpini LPB , Pierangeli A , Romero B , Wilkin T , Franceschi S , Hidalgo-Tenorio C , Ramautarsing RA , Park IU , Tso FK , Godbole S , D'Hauwers KWM , Sehnal B , Menezes LJ , Heraclio SA , Clifford GM . Lancet Infect Dis 2019 19 (8) 880-891 BACKGROUND: Cervical cancer screening might contribute to the prevention of anal cancer in women. We aimed to investigate if routine cervical cancer screening results-namely high-risk human papillomavirus (HPV) infection and cytohistopathology-predict anal HPV16 infection, anal high-grade squamous intraepithelial lesions (HSIL) and, hence, anal cancer. METHODS: We did a systematic review of MEDLINE, Embase, and the Cochrane library for studies of cervical determinants of anal HPV and HSIL published up to Aug 31, 2018. We centrally reanalysed individual-level data from 13 427 women with paired cervical and anal samples from 36 studies. We compared anal high-risk HPV prevalence by HIV status, cervical high-risk HPV, cervical cytohistopathology, age, and their combinations, using prevalence ratios (PR) and 95% CIs. Among 3255 women with anal cytohistopathology results, PRs were similarly calculated for all anal HSIL and HPV16-positive anal HSIL. FINDINGS: Cervical and anal HPV infections were highly correlated. In HIV-negative women, anal HPV16 prevalence was 41% (447/1097) in cervical HPV16-positive versus 2% (214/8663) in cervical HPV16-negative women (PR 16.5, 95% CI 14.2-19.2, p<0.0001); these values were 46% (125/273) versus 11% (272/2588) in HIV-positive women (4.4, 3.7-5.3, p<0.0001). Anal HPV16 was also associated with cervical cytohistopathology, with a prevalence of 44% [101/228] for cervical cancer in HIV-negative women (PR vs normal cytology 14.1, 11.1-17.9, p<0.0001). Anal HSIL was associated with cervical high-risk HPV, both in HIV-negative women (from 2% [11/527] in cervical high-risk HPV-negative women up to 24% [33/138] in cervical HPV16-positive women; PR 12.9, 95% CI 6.7-24.8, p<0.0001) and HIV-positive women (from 8% [84/1094] to 17% [31/186]; 2.3, 1.6-3.4, p<0.0001). Anal HSIL was also associated with cervical cytohistopathology, both in HIV-negative women (from 1% [5/498] in normal cytology up to 22% [59/273] in cervical HSIL; PR 23.1, 9.4-57.0, p<0.0001) and HIV-positive women (from 7% [105/1421] to 25% [25/101]; 3.6, 2.5-5.3, p<0.0001). Prevalence of HPV16-positive anal HSIL was 23-25% in cervical HPV16-positive women older than 45 years (5/20 in HIV-negative women, 12/52 in HIV-positive women). INTERPRETATION: HPV-based cervical cancer screening programmes might help to stratify anal cancer risk, irrespective of HIV status. For targeted secondary anal cancer prevention in high-risk groups, HIV-negative women with cervical HPV16, especially those older than 45 years, have a similar anal cancer risk profile to that of HIV-positive women. FUNDING: International Agency for Research on Cancer. |
Agreement between ELISA and plaque reduction neutralisation assay in detection of respiratory syncytial virus specific antibodies in a birth cohort from Kilifi, coastal Kenya
Nyiro JU , Kiyuka PK , Mutunga MN , Sande CJ , Munywoki PK , Scott JAG , Nokes DJ . Wellcome Open Res 2019 4 33 Background: Severe disease associated with respiratory syncytial virus (RSV) infection occurs predominantly among infants under 6 months of age. Vaccines for prevention are in clinical development. Assessment of the vaccine effectiveness in large epidemiological studies requires serological assays which are rapid, economical and standardised between laboratories. The objective of this study was to assess the agreement between two enzyme linked immunosorbent assays (ELISA) and the plaque reduction neutralisation test (PRNT) in quantifying RSV specific antibodies. Methods: Archived sera from 99 participants of the Kilifi Birth Cohort (KBC) study (conducted 2002-2007) were screened for RSV antibodies using 3 methods: ELISA using crude RSV lysate as antigen, a commercial RSV immunoglobulin G (IgG) ELISA kit from IBL International GmbH, and PRNT. Pearson correlation, Bland-Altman plots and regression methods were used in analysis. Results: There was high positive correlation between the IBL RSV IgG ELISA and PRNT antibodies (Pearson r=0.75), and moderate positive correlation between the crude RSV lysate IgG ELISA and PRNT antibodies (r= 0.61). Crude RSV lysate IgG ELISA showed a wider 95% limit of agreement (-1.866, 6.157) with PRNT compared to the IBL RSV IgG ELISA (1.392, 7.595). Mean PRNT titres were estimated within a width of 4.8 log 2PRNT and 5.6 log 2PRNT at 95% prediction interval by IBL RSV IgG and crude RSV lysate IgG ELISA, respectively. Conclusion: Although, the IBL RSV IgG ELISA is observed to provide a reasonable correlate for PRNT assay in detecting RSV specific antibodies, it does not provide an accurate prediction for neutralizing antibody levels. An RSV neutralising antibody level is likely to fall within 2.4 fold higher and 2.4 fold lower than the true value if IBL RSV IgG ELISA is used to replace PRNT assay. The utility of an ELISA assay in vaccine studies should be assessed independent of the PRNT method. |
HIV and transgender women in Kampala, Uganda - double jeopardy
King R , Nanteza J , Sebyala Z , Bbaale J , Sande E , Poteat T , Kiyingi H , Hladik W . Cult Health Sex 2018 21 (6) 1-14 Transgender women in Kampala face stigma, high HIV acquisition or transmission risk and poor access to health services. We explored the HIV and gender-related contexts of their lives. Snowball sampling was used to enrol 45 participants between July-October 2013. Data collection included audio-computer-assisted self-interviews, qualitative face-to-face interviews and blood tests for HIV and CD4. One in five respondents tested HIV positive. Emergent themes revealed highly varied forms of gender identity and gender expression. Almost all respondents asserted that they frequently engaged in sex work, mainly due to lack of employment. HIV-related themes included limited access to non-stigmatising health services, inconsistent condom use, inaccurate perceptions of self and partners' risk, alcohol use, receptive anal sex with men, multiple sex partners, frequent self and enacted stigma, and violence. Findings highlight the urgency of providing members of this marginalised population with tailored, innovative, comprehensive and effective HIV prevention programmes that address structural issues such as access to HIV services and limited employment as well as behavioural issues such as inconsistent condom use, multiple sexual partners, self and enacted stigma, violence and alcohol use. |
Correlates of undiagnosed HIV infection and retesting among voluntary HIV testing clients at Mildmay Clinic, Uganda
Hakim AJ , Mukasa B , Hundley L , Odiit M , Ogwal M , Sendagala S , Karamagi Y , Sande E , Hladik W . AIDS Behav 2018 23 (4) 820-834 Increasing HIV diagnosis is important for combatting HIV. We invited individuals aged >/= 13 years seeking voluntary HIV testing at Mildmay Clinic in Uganda to undertake a computer or audio-computer-assisted self-interview to facilitate post-test counseling. We evaluated first-visit data from 12,233 consenting individuals between January 2011 and October 2013. HIV prevalence was 39.0%. Of those with HIV, 37.2% already knew they were infected. Undiagnosed infection was associated with not being single, screening positive for depression (aOR 1.16, 95% CI 1.04-1.28), and screening for harmful drinking behavior (aOR 1.23, 95% CI 1.10-1.39). The odds of retesting subsequent to HIV diagnosis were lower for males (aOR 0.80, 95% CI 0.70-0.92) and those screening positive for harmful drinking behavior (aOR 0.77, 95% CI 0.66-0.88). Retesting was also associated with higher education and perceived social status below 'better off'. Our findings reiterate the value of population-based HIV surveys to provide estimates of testing coverage. |
Progress toward UNAIDS 90-90-90 targets: A respondent-driven survey among female sex workers in Kampala, Uganda
Doshi RH , Sande E , Ogwal M , Kiyingi H , McIntyre A , Kusiima J , Musinguzi G , Serwadda D , Hladik W . PLoS One 2018 13 (9) e0201352 BACKGROUND: We investigated progress towards UNAIDS 90-90-90 targets among female sex workers in Kampala, Uganda, who bear a disproportionate burden of HIV. METHODS: Between April and December 2012, 1,487 female sex workers, defined as women, 15-49 years, residing in greater Kampala, and selling sex for money in the last 6 months, were recruited using respondent-driven sampling. Venous blood was collected for HIV and viral load testing [viral load suppression (VLS) defined as <1,000 copies/mL]. We collected data using audio computer-assisted self-interviews and calculated weighted population-level estimates. RESULTS: The median age was 27 years (interquartile range: 23 to 32). HIV seroprevalence was 31.4% (95% confidence interval [CI]: 29.0, 33.7%). Among all female sex workers who tested HIV-positive in the survey (population-level targets), 45.5% (95% CI: 40.1, 51.0) had knowledge of their serostatus (population-level target: 90%), 37.8% (95% CI: 32.2, 42.8) self-reported to be on ART (population-level target: 81%), and 35.2% (95% CI: 20.7, 30.4) were virally suppressed (population-level target: 73%). CONCLUSIONS: HIV prevalence among Kampala female sex workers is high, whereas serostatus knowledge and VLS are far below UNAIDS targets. Kampala female sex workers are in need of intensified and targeted HIV prevention and control efforts. |
Household costs among patients hospitalized with malaria: evidence from a national survey in Malawi, 2012
Hennessee I , Chinkhumba J , Briggs-Hagen M , Bauleni A , Shah MP , Chalira A , Moyo D , Dodoli W , Luhanga M , Sande J , Ali D , Gutman J , Lindblade KA , Njau J , Mathanga DP . Malar J 2017 16 (1) 395 BACKGROUND: With 71% of Malawians living on < $1.90 a day, high household costs associated with severe malaria are likely a major economic burden for low income families and may constitute an important barrier to care seeking. Nevertheless, few efforts have been made to examine these costs. This paper describes household costs associated with seeking and receiving inpatient care for malaria in health facilities in Malawi. METHODS: A cross-sectional survey was conducted in a representative nationwide sample of 36 health facilities providing inpatient treatment for malaria from June-August, 2012. Patients admitted at least 12 h before study team visits who had been prescribed an antimalarial after admission were eligible to provide cost information for their malaria episode, including care seeking at previous health facilities. An ingredients-based approach was used to estimate direct costs. Indirect costs were estimated using a human capital approach. Key drivers of total household costs for illness episodes resulting in malaria admission were assessed by fitting a generalized linear model, accounting for clustering at the health facility level. RESULTS: Out of 100 patients who met the eligibility criteria, 80 (80%) provided cost information for their entire illness episode to date and were included: 39% of patients were under 5 years old and 75% had sought care for the malaria episode at other facilities prior to coming to the current facility. Total household costs averaged $17.48 per patient; direct and indirect household costs averaged $7.59 and $9.90, respectively. Facility management type, household distance from the health facility, patient age, high household wealth, and duration of hospital stay were all significant drivers of overall costs. CONCLUSIONS: Although malaria treatment is supposed to be free in public health facilities, households in Malawi still incur high direct and indirect costs for malaria illness episodes that result in hospital admission. Finding ways to minimize the economic burden of inpatient malaria care is crucial to protect households from potentially catastrophic health expenditures. |
Standardized interpretation of chest radiographs in cases of pediatric pneumonia from the PERCH Study
Fancourt N , Deloria Knoll M , Barger-Kamate B , de Campo J , de Campo M , Diallo M , Ebruke BE , Feikin DR , Gleeson F , Gong W , Hammitt LL , Izadnegahdar R , Kruatrachue A , Madhi SA , Manduku V , Matin FB , Mahomed N , Moore DP , Mwenechanya M , Nahar K , Oluwalana C , Ominde MS , Prosperi C , Sande J , Suntarattiwong P , O'Brien KL . Clin Infect Dis 2017 64 S253-s261 Background.: Chest radiographs (CXRs) are a valuable diagnostic tool in epidemiologic studies of pneumonia. The World Health Organization (WHO) methodology for the interpretation of pediatric CXRs has not been evaluated beyond its intended application as an endpoint measure for bacterial vaccine trials. Methods.: The Pneumonia Etiology Research for Child Health (PERCH) study enrolled children aged 1-59 months hospitalized with WHO-defined severe and very severe pneumonia from 7 low- and middle-income countries. An interpretation process categorized each CXR into 1 of 5 conclusions: consolidation, other infiltrate, both consolidation and other infiltrate, normal, or uninterpretable. Two members of a 14-person reading panel, who had undertaken training and standardization in CXR interpretation, interpreted each CXR. Two members of an arbitration panel provided additional independent reviews of CXRs with discordant interpretations at the primary reading, blinded to previous reports. Further discordance was resolved with consensus discussion. Results.: A total of 4172 CXRs were obtained from 4232 cases. Observed agreement for detecting consolidation (with or without other infiltrate) between primary readers was 78% (kappa = 0.50) and between arbitrators was 84% (kappa = 0.61); agreement for primary readers and arbitrators across 5 conclusion categories was 43.5% (kappa = 0.25) and 48.5% (kappa = 0.32), respectively. Disagreement was most frequent between conclusions of other infiltrate and normal for both the reading panel and the arbitration panel (32% and 30% of discordant CXRs, respectively). Conclusions.: Agreement was similar to that of previous evaluations using the WHO methodology for detecting consolidation, but poor for other infiltrates despite attempts at a rigorous standardization process. |
Lessons learned from Option B+ in the evolution toward "Test and Start" from Malawi, Cameroon, and the United Republic of Tanzania
Kalua T , Tippett Barr BA , van Oosterhout JJ , Mbori-Ngacha D , Schouten EJ , Gupta S , Sande A , Zomba G , Tweya H , Lungu E , Kajoka D , Tih P , Jahn A . J Acquir Immune Defic Syndr 2017 75 Suppl 1 S43-s50 The acceleration of prevention of mother-to-child transmission (PMTCT) activities, coupled with the rollout of 2010 World Health Organization (WHO) guidelines, led to important discussions and innovations at global and country levels. One paradigm-shifting innovation was Option B+ in Malawi. It was later included in WHO guidelines and eventually adopted by all 22 Global Plan priority countries. This article presents Malawi's experience with designing and implementing Option B+ and provides complementary narratives from Cameroon and Tanzania. Malawi's HIV program started in 2002, but by 2009, the PMTCT program was lagging far behind the antiretroviral therapy (ART) program because of numerous health system challenges. When WHO recommended Option A and Option B for PMTCT in 2010, it was clear that Malawi's HIV program would not be able to successfully implement either option without increasing existing barriers to PMTCT services and potentially decreasing women's access to care. Subsequent stakeholder discussions led to the development of Option B+. Operationalizing Option B+ required several critical considerations, including the complete integration of ART and PMTCT programs, systematic reduction of barriers to facilitate doubling the number of ART sites in less than a year, building consensus with stakeholders, and securing additional resources for the new program. During the planning and implementation process, several lessons were learned which are considerations for countries transitioning to "treat-all": Comprehensive change requires effective government leadership and coordination; national clinical guidelines must accommodate health system limitations; ART services and commodities should be decentralized within facilities; the general public should be well informed about major changes in the national HIV program; and patients should be educated on clinic processes to improve program monitoring. |
Men who have sex with men in Kampala, Uganda: Results from a bio-behavioral respondent driven sampling survey
Hladik W , Sande E , Berry M , Ganafa S , Kiyingi H , Kusiima J , Hakim A . AIDS Behav 2016 21 (5) 1478-1490 We report on the results of a respondent-driven sampling survey among men who have sex with men (MSM) in Kampala, Uganda, where same-sex behavior is criminalized and highly stigmatized. We enrolled 608 MSM aged 18 + years and residing in greater Kampala from June 2012-November 2013. Anonymous data were collected through audio-computer assisted self-interviews; blood was tested for HIV-1 antibodies, CD4 + T cell counts, and viral load. Estimated HIV prevalence was 12.2 % (95 % confidence interval [CI] 8.0-16.1), increasing with age. One in five (19.6 %) stated knowing their HIV-positive status and a similar proportion of HIV-infected MSM were virally suppressed (19.3 %; 95 % CI 3.3-33.1). HIV-related risk behaviors included unprotected anal sex (35.8 % at last sex act), selling sex (38.5 %), having multiple steady (54.3 %) or casual (63.6 %) partners, and ever injecting drugs (31.6 %). Forty percent experienced homophobic abuse; 44.5 % ever experienced suicide ideation. HIV prevalence among MSM remains high whereas knowledge of seropositive status and suppression of viral load remains low. MSM report a wide range of high risk behaviors, frequent homophobic abuse, poor mental health, as well as low levels of testing and treatment. Better access to tailored prevention and treatment services to improve population-level viral load suppression are warranted. |
Adherence to national guidelines for the diagnosis and management of severe malaria: a nationwide, cross-sectional survey in Malawi, 2012
Shah MP , Briggs-Hagen M , Chinkhumba J , Bauleni A , Chalira A , Moyo D , Dodoli W , Luhanga M , Sande J , Ali D , Gutman J , Mathanga DP , Lindblade KA . Malar J 2016 15 (1) 369 BACKGROUND: Severe malaria has a case fatality rate of 10-20 %; however, few studies have addressed the quality of severe malaria case management. This study evaluated the diagnostic and treatment practices of malaria patients admitted to inpatient health facilities (HF) in Malawi. METHODS: In July-August 2012, a nationwide, cross-sectional survey of severe malaria management was conducted in 36 HFs selected with equal probability from all eligible public sector HFs in Malawi. Patient records from all admissions during October 2011 and April 2012 (low and high season, respectively) were screened for an admission diagnosis of malaria or prescription of any anti-malarial. Eligible records were stratified by age (< 5 or ≥ 5 years). A maximum of eight records was randomly selected within each age and month stratum. Severe malaria was defined by admission diagnosis or documentation of at least one sign or symptom of severe malaria. Treatment with intravenous (IV) quinine or artesunate was considered correct. Patients without documentation of severe malaria were analysed as uncomplicated malaria patients; treatment with an artemisinin-based combination therapy (ACT) or oral quinine based on malaria test results was considered correct. All analyses accounted for HF level clustering and sampling weights. RESULTS: The analysis included 906 records from 35 HFs. Among these, 42 % (95 % confidence interval [CI] 35-49) had a severe malaria admission diagnosis and 50 % (95 % CI 44-57) had at least one severe malaria sign or symptom documented. Severe malaria patients defined by admission diagnosis (93, 95 % CI 86-99) were more likely to be treated correctly compared to patients defined by a severe sign (82, 95 % CI 75-89) (p < 0.0001). Among uncomplicated malaria patients, 26 % (95 % CI 18-35) were correctly treated and 53 % (95 % CI 42-64) were adequately treated with IV quinine alone or in combination with an ACT or oral quinine. CONCLUSIONS: A majority of patients diagnosed with severe malaria received the recommended IV therapy in accordance with national treatment guidelines. However, the inconsistencies between diagnosis of severe malaria and documentation of severe signs and symptoms highlight the need to improve healthcare worker recognition and documentation of severe signs and symptoms. |
In vivo efficacy of artemether-lumefantrine and artesunate-amodiaquine for uncomplicated Plasmodium falciparum malaria in Malawi, 2014.
Paczkowski M , Mwandama D , Marthey D , Luka M , Makuta G , Sande J , Ali D , Troell P , Mathanga DP , Gutman J . Malar J 2016 15 236 BACKGROUND: Malaria causes significant morbidity in Malawi, with an estimated 5 million cases in 2014. Artemether-lumefantrine (AL) and artesunate-amodiaquine (ASAQ) are the first- and second-line treatments for uncomplicated malaria, respectively, but emerging resistance threatens their efficacy. In order to understand whether AL and ASAQ remain efficacious for the treatment of uncomplicated Plasmodium falciparum malaria in Malawi, a therapeutic efficacy trial was conducted. METHODS: During March-July 2014, febrile children aged 6-59 months with microscopy-confirmed uncomplicated P. falciparum malaria (1000-200,000 parasites/muL) were enrolled in a 28-day randomized in vivo efficacy trial at three sites: one each in northern (Karonga), central (Nkhotakota) and southern (Machinga) Malawi. The study was powered to estimate site-specific efficacy for AL and overall efficacy for ASAQ, with 3:1 randomization to AL or ASAQ. Blood was collected for malaria microscopy and molecular testing on days 0-3, 7, 14, 21, and 28. Recrudescence and reinfection were differentiated using polymerase chain reaction (PCR) genotyping of merozoite surface protein. The primary outcome was the PCR-corrected day 28 Kaplan-Meier cumulative success rate. RESULTS: A total of 452 children were enrolled; 303/338 (89 %) and 98/114 (86 %) reached a study endpoint in AL and ASAQ arms, respectively. All treatment failures occurred after day 3. The day 28 uncorrected cumulative success rate was 97.1 % (95 % confidence interval [CI]: 93.9-100 %) for ASAQ and 76.8 % (95 % CI 72.1-81.5 %) for AL, with 82.5 % (95 % CI 75.4-89.7 %), 69 % (95 % CI 59.9-78.1 %), and 78.2 % (95 % CI 70.2-86.3 %) success in the northern, central, and southern regions, respectively. The day 28 PCR-corrected cumulative success rate was 99 % (95 % CI 97.2-100 %) in the ASAQ arm and 99.3 % (95 % CI 98.3-100 %) in the AL arm, with 98-100 % efficacy in each site. CONCLUSIONS: As evidenced by the day 28 PCR-corrected cumulative success rates, both AL and ASAQ remain efficacious treatments for uncomplicated malaria in Malawi. The lower uncorrected efficacy in the AL arm compared to ASAQ may be explained by the shorter half-life of lumefantrine (3-6 days) compared to amodiaquine (9-18 days). The high reinfection rate suggests that there is a continued need to scale-up effective malaria prevention interventions. |
Nationwide assessment of insecticide susceptibility in Anopheles gambiae populations from Zimbabwe
Lukwa N , Sande S , Makuwaza A , Chiwade T , Netsa M , Asamoa K , Vazquez-Prokopec G , Reithinger R , Williams J . Malar J 2014 13 408 BACKGROUND: The scale-up of malaria interventions in sub-Saharan Africa has been accompanied by a dramatic increase in insecticide resistance in Anopheles spp. In Zimbabwe resistance to pyrethroid insecticides was reported in Gokwe District in 2008. This study reports results of the first nation-wide assessment of insecticide susceptibility in wild populations of Anopheles gambiae sensu lato (s.l.) in Zimbabwe, and provides a comprehensive review of the insecticide resistance status of An. gambiae s.l. in southern African countries. METHODS: World Health Organization (WHO) insecticide susceptibility tests were performed on 2,568 field collected mosquitoes originating from 13 sentinel sites covering all endemic regions in Zimbabwe in 2011-2012. At each site, 24-hour mortality and knock-down values for 50% and 90% of exposed mosquitoes (KD50 and KD90, respectively) were calculated for pools of 20-84 (mean, 54) mosquitoes exposed to 4% DDT, 0.1% bendiocarb, 0.05% lambda-cyhalothrin or 5% malathion. Susceptibility results from Zimbabwe were compiled with results published during 2002-2012 for all southern African countries to investigate the resistance status of An. gambiae s.l. in the region. RESULTS: Using WHO criteria, insecticide resistance was not detected at any site sampled and for any of the insecticide formulations tested during the malaria transmission season in 2012. Knock-down within 1 hr post-insecticide exposure ranged from 95% to 100%; mortality 24 hours post-insecticide exposure ranged from 98% to 100%. Despite the lack of insecticide resistance, high variability was found across sites in KD50 and KD90 values. A total of 24 out of 64 (37.5%) sites in southern Africa with reported data had evidence of phenotypic insecticide resistance in An. gambiae s.l. to at least one insecticide. CONCLUSION: Despite a long history of indoor residual spraying of households with insecticide, up to 2012 there was no evidence of phenotypic resistance to any of the four insecticide classes in An. gambiae s.l. collected across different eco-epidemiological areas in Zimbabwe. Results reinforce the need for careful monitoring over time in sentinel sites in order to detect the potential emergence and propagation of insecticide resistance as insecticidal vector control interventions in Zimbabwe continue to be implemented. |
Patient-, health worker-, and health facility-level determinants of correct malaria case management at publicly funded health facilities in Malawi: results from a nationally representative health facility survey
Steinhardt LC , Chinkhumba J , Wolkon A , Luka M , Luhanga M , Sande J , Oyugi J , Ali D , Mathanga D , Skarbinski J . Malar J 2014 13 (1) 64 BACKGROUND: Prompt and effective case management is needed to reduce malaria morbidity and mortality. However, malaria diagnosis and treatment is a multistep process that remains problematic in many settings, resulting in missed opportunities for effective treatment as well as overtreatment of patients without malaria. METHODS: Prior to the widespread roll-out of malaria rapid diagnostic tests (RDTs) in late 2011, a national, cross-sectional, complex-sample, health facility survey was conducted in Malawi to assess patient-, health worker-, and health facility-level factors associated with malaria case management quality using multivariate Poisson regression models. RESULTS: Among the 2,019 patients surveyed, 34% had confirmed malaria defined as presence of fever and parasitaemia on a reference blood smear. Sixty-seven per cent of patients with confirmed malaria were correctly prescribed the first-line anti-malarial, with most cases of incorrect treatment due to missed diagnosis; 31% of patients without confirmed malaria were overtreated with an anti-malarial. More than one-quarter of patients were not assessed for fever or history of fever by health workers. The most important determinants of correct malaria case management were patient-level clinical symptoms, such as spontaneous complaint of fever to health workers, which increased both correct treatment and overtreatment by 72 and 210%, respectively (p < 0.0001). Complaint of cough was associated with a 27% decreased likelihood of correct malaria treatment (p = 0.001). Lower-level cadres of health workers were more likely to prescribe anti-malarials for patients, increasing the likelihood of both correct treatment and overtreatment, but no other health worker or health facility-level factors were significantly associated with case management quality. CONCLUSIONS: Introduction of RDTs holds potential to improve malaria case management in Malawi, but health workers must systematically assess all patients for fever, and then test and treat accordingly, otherwise, malaria control programmes might miss an opportunity to dramatically improve malaria case management, despite better diagnostic tools. |
Quality of malaria case management in Malawi: results from a nationally representative health facility survey
Steinhardt LC , Chinkhumba J , Wolkon A , Luka M , Luhanga M , Sande J , Oyugi J , Ali D , Mathanga D , Skarbinski J . PLoS One 2014 9 (2) e89050 BACKGROUND: Malaria is endemic throughout Malawi, but little is known about quality of malaria case management at publicly-funded health facilities, which are the major source of care for febrile patients. METHODS: In April-May 2011, we conducted a nationwide, geographically-stratified health facility survey to assess the quality of outpatient malaria diagnosis and treatment. We enrolled patients presenting for care and conducted exit interviews and re-examinations, including reference blood smears. Moreover, we assessed health worker readiness (e.g., training, supervision) and health facility capacity (e.g. availability of diagnostics and antimalarials) to provide malaria case management. All analyses accounted for clustering and unequal selection probabilities. We also used survey weights to produce estimates of national caseloads. RESULTS: At the 107 facilities surveyed, most of the 136 health workers interviewed (83%) had received training on malaria case management. However, only 24% of facilities had functional microscopy, 15% lacked a thermometer, and 19% did not have the first-line artemisinin-based combination therapy (ACT), artemether-lumefantrine, in stock. Of 2,019 participating patients, 34% had clinical malaria (measured fever or self-reported history of fever plus a positive reference blood smear). Only 67% (95% confidence interval (CI): 59%, 76%) of patients with malaria were correctly prescribed an ACT, primarily due to missed malaria diagnosis. Among patients without clinical malaria, 31% (95% CI: 24%, 39%) were prescribed an ACT. By our estimates, 1.5 million of the 4.4 million malaria patients seen in public facilities annually did not receive correct treatment, and 2.7 million patients without clinical malaria were inappropriately given an ACT. CONCLUSIONS: Malawi has a high burden of uncomplicated malaria but nearly one-third of all patients receive incorrect malaria treatment, including under- and over-treatment. To improve malaria case management, facilities must at minimum have basic case management tools, and health worker performance in diagnosing malaria must be improved. |
Adherence to treatment with artemether-lumefantrine for uncomplicated malaria in rural Malawi
Mace KE , Mwandama D , Jafali J , Luka M , Filler SJ , Sande J , Ali D , Kachur SP , Mathanga DP , Skarbinski J . Clin Infect Dis 2011 53 (8) 772-9 BACKGROUND: In 2007, Malawi replaced the first-line medication for uncomplicated malaria, sulfadoxine-pyrimethamine-a single-dose regimen-with artemether-lumefantrine (AL)-a 6-dose, 3-day regimen. Because of concerns about the complex dosing schedule, we assessed patient adherence to AL 2 years after routine implementation. METHODS: Adults and children with uncomplicated malaria were recruited at 3 health centers. We conducted both pill counts and in-home interviews on medication consumption 72 hours after patients received AL. Complete adherence was defined as correctly taking all 6 AL doses, as assessed by pill count and dose recall. We used logistic regression to identify factors associated with complete adherence. RESULTS: Of 386 patients, 65% were completely adherent. Patients were significantly more likely to be completely adherent if they received their first dose of AL as directly observed therapy at the health center (odds ratio [OR], 2.4; P < .01), received instructions using the medication package as a visual aid (OR, 2.5; P = .02), and preferred AL over other antimalarials (OR, 2.7; P < .001). In contrast, children <5 years of age were significantly less likely to be adherent (OR, 0.5; P = .05). CONCLUSION: Adherence to AL treatment for uncomplicated malaria was moderate, and children, who are the most likely to die of malaria, were less adherent than adults. Efforts to improve adherence should be focused on this vulnerable group. Interventions including the introduction of child-friendly antimalarial formulations, direct observation of the first dose, use of the AL package as a visual aid for instructions, and enhancing patient preference for AL could potentially increase AL adherence and overall effectiveness. |
Risk factors for severe outcomes following 2009 influenza A (H1N1) infection: a global pooled analysis
Van Kerkhove MD , Vandemaele KA , Shinde V , Jaramillo-Gutierrez G , Koukounari A , Donnelly CA , Carlino LO , Owen R , Paterson B , Pelletier L , Vachon J , Gonzalez C , Hongjie Y , Zijian F , Chuang SK , Au A , Buda S , Krause G , Haas W , Bonmarin I , Taniguichi K , Nakajima K , Shobayashi T , Takayama Y , Sunagawa T , Heraud JM , Orelle A , Palacios E , van der Sande MA , Wielders CC , Hunt D , Cutter J , Lee VJ , Thomas J , Santa-Olalla P , Sierra-Moros MJ , Hanshaoworakul W , Ungchusak K , Pebody R , Jain S , Mounts AW . PLoS Med 2011 8 (7) e1001053 BACKGROUND: Since the start of the 2009 influenza A pandemic (H1N1pdm), the World Health Organization and its member states have gathered information to characterize the clinical severity of H1N1pdm infection and to assist policy makers to determine risk groups for targeted control measures. METHODS AND FINDINGS: Data were collected on approximately 70,000 laboratory-confirmed hospitalized H1N1pdm patients, 9,700 patients admitted to intensive care units (ICUs), and 2,500 deaths reported between 1 April 2009 and 1 January 2010 from 19 countries or administrative regions-Argentina, Australia, Canada, Chile, China, France, Germany, Hong Kong SAR, Japan, Madagascar, Mexico, the Netherlands, New Zealand, Singapore, South Africa, Spain, Thailand, the United States, and the United Kingdom-to characterize and compare the distribution of risk factors among H1N1pdm patients at three levels of severity: hospitalizations, ICU admissions, and deaths. The median age of patients increased with severity of disease. The highest per capita risk of hospitalization was among patients <5 y and 5-14 y (relative risk [RR] = 3.3 and 3.2, respectively, compared to the general population), whereas the highest risk of death per capita was in the age groups 50-64 y and ≥65 y (RR = 1.5 and 1.6, respectively, compared to the general population). Similarly, the ratio of H1N1pdm deaths to hospitalizations increased with age and was the highest in the ≥65-y-old age group, indicating that while infection rates have been observed to be very low in the oldest age group, risk of death in those over the age of 64 y who became infected was higher than in younger groups. The proportion of H1N1pdm patients with one or more reported chronic conditions increased with severity (median = 31.1%, 52.3%, and 61.8% of hospitalized, ICU-admitted, and fatal H1N1pdm cases, respectively). With the exception of the risk factors asthma, pregnancy, and obesity, the proportion of patients with each risk factor increased with severity level. For all levels of severity, pregnant women in their third trimester consistently accounted for the majority of the total of pregnant women. Our findings suggest that morbid obesity might be a risk factor for ICU admission and fatal outcome (RR = 36.3). CONCLUSIONS: Our results demonstrate that risk factors for severe H1N1pdm infection are similar to those for seasonal influenza, with some notable differences, such as younger age groups and obesity, and reinforce the need to identify and protect groups at highest risk of severe outcomes. Please see later in the article for the Editors' Summary. |
Comparative field performance and adherence to test results of four malaria rapid diagnostic tests among febrile patients more than five years of age in Blantyre, Malawi
Chinkhumba J , Skarbinski J , Chilima B , Campbell C , Ewing V , San Joaquin M , Sande J , Ali D , Mathanga D . Malar J 2010 9 209 BACKGROUND: Malaria rapid diagnostics tests (RDTs) can increase availability of laboratory-based diagnosis and improve the overall management of febrile patients in malaria endemic areas. In preparation to scale-up RDTs in health facilities in Malawi, an evaluation of four RDTs to help guide national-level decision-making was conducted. METHODS: A cross sectional study of four histidine rich-protein-type-2- (HRP2) based RDTs at four health centres in Blantyre, Malawi, was undertaken to evaluate the sensitivity and specificity of RDTs, assess prescriber adherence to RDT test results and explore operational issues regarding RDT implementation. Three RDTs were evaluated in only one health centre each and one RDT was evaluated in two health centres. Light microscopy in a reference laboratory was used as the gold standard. RESULTS: A total of 2,576 patients were included in the analysis. All of the RDTs tested had relatively high sensitivity for detecting any parasitaemia [Bioline SD (97%), First response malaria (92%), Paracheck (91%), ICT diagnostics (90%)], but low specificity [Bioline SD (39%), First response malaria (42%), Paracheck (68%), ICT diagnostics (54%)]. Specificity was significantly lower in patients who self-treated with an anti-malarial in the previous two weeks (odds ratio (OR) 0.5; p-value < 0.001), patients 5-15 years old versus patients > 15 years old (OR 0.4, p-value < 0.001) and when the RDT was performed by a community health worker versus a laboratory technician (OR 0.4; p-value < 0.001). Health workers correctly prescribed anti-malarials for patients with positive RDT results, but ignored negative RDT results with 58% of patients with a negative RDT result treated with an anti-malarial. CONCLUSIONS: The results of this evaluation, combined with other published data and global recommendations, have been used to select RDTs for national scale-up. In addition, the study identified some key issues that need to be further delineated: the low field specificity of RDTs, variable RDT performance by different cadres of health workers and the need for a robust quality assurance system. Close monitoring of RDT scale-up will be needed to ensure that RDTs truly improve malaria case management. |
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