Last data update: May 13, 2024. (Total: 46773 publications since 2009)
Records 1-16 (of 16 Records) |
Query Trace: Njoroge T[original query] |
---|
Detection of Anopheles stephensi mosquitoes by molecular surveillance, Kenya
Ochomo EO , Milanoi S , Abong'o B , Onyango B , Muchoki M , Omoke D , Olanga E , Njoroge L , Juma EO , Otieno JD , Matoke-Muhia D , Kamau L , Rafferty C , Gimnig JE , Shieshia M , Wacira D , Mwangangi J , Maia M , Chege C , Omar A , Rono MK , Abel L , O'Meara WP , Obala A , Mbogo C , Kariuki L . Emerg Infect Dis 2023 29 (12) 2498-2508 The Anopheles stephensi mosquito is an invasive malaria vector recently reported in Djibouti, Ethiopia, Sudan, Somalia, Nigeria, and Ghana. The World Health Organization has called on countries in Africa to increase surveillance efforts to detect and report this vector and institute appropriate and effective control mechanisms. In Kenya, the Division of National Malaria Program conducted entomological surveillance in counties at risk for An. stephensi mosquito invasion. In addition, the Kenya Medical Research Institute conducted molecular surveillance of all sampled Anopheles mosquitoes from other studies to identify An. stephensi mosquitoes. We report the detection and confirmation of An. stephensi mosquitoes in Marsabit and Turkana Counties by using endpoint PCR and morphological and sequence identification. We demonstrate the urgent need for intensified entomological surveillance in all areas at risk for An. stephensi mosquito invasion, to clarify its occurrence and distribution and develop tailored approaches to prevent further spread. |
Heterogenous transmission and seroprevalence of SARS-CoV-2 in two demographically diverse populations with low vaccination uptake in Kenya, March and June 2021
Munywoki PK , Bigogo G , Nasimiyu C , Ouma A , Aol G , Oduor CO , Rono S , Auko J , Agogo GO , Njoroge R , Oketch D , Odhiambo D , Odeyo VW , Kikwai G , Onyango C , Juma B , Hunsperger E , Lidechi S , Ochieng CA , Lo TQ , Munyua P , Herman-Roloff A . Gates Open Res 2023 7 101 BACKGROUND: SARS-CoV-2 has extensively spread in cities and rural communities, and studies are needed to quantify exposure in the population. We report seroprevalence of SARS-CoV-2 in two well-characterized populations in Kenya at two time points. These data inform the design and delivery of public health mitigation measures. METHODS: Leveraging on existing population based infectious disease surveillance (PBIDS) in two demographically diverse settings, a rural site in western Kenya in Asembo, Siaya County, and an urban informal settlement in Kibera, Nairobi County, we set up a longitudinal cohort of randomly selected households with serial sampling of all consenting household members in March and June/July 2021. Both sites included 1,794 and 1,638 participants in the March and June/July 2021, respectively. Individual seroprevalence of SARS-CoV-2 antibodies was expressed as a percentage of the seropositive among the individuals tested, accounting for household clustering and weighted by the PBIDS age and sex distribution. RESULTS: Overall weighted individual seroprevalence increased from 56.2% (95%CI: 52.1, 60.2%) in March 2021 to 63.9% (95%CI: 59.5, 68.0%) in June 2021 in Kibera. For Asembo, the seroprevalence almost doubled from 26.0% (95%CI: 22.4, 30.0%) in March 2021 to 48.7% (95%CI: 44.3, 53.2%) in July 2021. Seroprevalence was highly heterogeneous by age and geography in these populations-higher seroprevalence was observed in the urban informal settlement (compared to the rural setting), and children aged <10 years had the lowest seroprevalence in both sites. Only 1.2% and 1.6% of the study participants reported receipt of at least one dose of the COVID-19 vaccine by the second round of serosurvey-none by the first round. CONCLUSIONS: In these two populations, SARS-CoV-2 seroprevalence increased in the first 16 months of the COVID-19 pandemic in Kenya. It is important to prioritize additional mitigation measures, such as vaccine distribution, in crowded and low socioeconomic settings. |
Randomized controlled phase IIa clinical trial of safety, pharmacokinetics and pharmacodynamics of tenofovir and tenofovir plus levonorgestrel releasing intravaginal rings used by women in Kenya
Mugo NR , Mudhune V , Heffron R , Thomas KK , McLellan-Lemal E , Njoroge B , Peacock S , O'Connor SM , Nyagol B , Ouma E , Ridzon R , Wiener J , Isoherranen N , Erikson DW , Ouattara LA , Yousefieh N , Jacot TA , Haaland RE , Morrison SA , Haugen HS , Thurman AR , Allen SA , Baeten JM , Samandari T , Doncel GF . Front Reprod Health 2023 5 1118030 INTRODUCTION: Globally, many young women face the overlapping burden of HIV infection and unintended pregnancy. Protection against both may benefit from safe and effective multipurpose prevention technologies. METHODS: Healthy women ages 18-34 years, not pregnant, seronegative for HIV and hepatitis B surface antigen, not using hormonal contraception, and at low risk for HIV were randomized 2:2:1 to continuous use of a tenofovir/levonorgestrel (TFV/LNG), TFV, or placebo intravaginal ring (IVR). In addition to assessing genital and systemic safety, we determined TFV concentrations in plasma and cervicovaginal fluid (CVF) and LNG levels in serum using tandem liquid chromatography-mass spectrometry. We further evaluated TFV pharmacodynamics (PD) through ex vivo CVF activity against both human immunodeficiency virus (HIV)-1 and herpes simplex virus (HSV)-2, and LNG PD using cervical mucus quality markers and serum progesterone for ovulation inhibition. RESULTS: Among 312 women screened, 27 were randomized to use one of the following IVRs: TFV/LNG (n = 11); TFV-only (n = 11); or placebo (n = 5). Most screening failures were due to vaginal infections. The median days of IVR use was 68 [interquartile range (IQR), 36-90]. Adverse events (AEs) were distributed similarly among the three arms. There were two non-product related AEs graded >2. No visible genital lesions were observed. Steady state geometric mean amount (ssGMA) of vaginal TFV was comparable in the TFV/LNG and TFV IVR groups, 43,988 ng/swab (95% CI, 31,232, 61,954) and 30337 ng/swab (95% CI, 18,152, 50,702), respectively. Plasma TFV steady state geometric mean concentration (ssGMC) was <10 ng/ml for both TFV IVRs. In vitro, CVF anti-HIV-1 activity showed increased HIV inhibition over baseline following TFV-eluting IVR use, from a median of 7.1% to 84.4% in TFV/LNG, 15.0% to 89.5% in TFV-only, and -27.1% to -20.1% in placebo participants. Similarly, anti-HSV-2 activity in CVF increased >50 fold after use of TFV-containing IVRs. LNG serum ssGMC was 241 pg/ml (95% CI 185, 314) with rapid rise after TFV/LNG IVR insertion and decline 24-hours post-removal (586 pg/ml [95% CI 473, 726] and 87 pg/ml [95% CI 64, 119], respectively). CONCLUSION: TFV/LNG and TFV-only IVRs were safe and well tolerated among Kenyan women. Pharmacokinetics and markers of protection against HIV-1, HSV-2, and unintended pregnancy suggest the potential for clinical efficacy of the multipurpose TFV/LNG IVR. CLINICAL TRIAL REGISTRATION: NCT03762382 [https://clinicaltrials.gov/ct2/show/NCT03762382]. |
Seroprevalence and risk factors of SARS-CoV-2 infection in an urban informal settlement in Nairobi, Kenya, December 2020 (preprint)
Munywoki PK , Nasimiyu C , Alando MD , Otieno N , Ombok C , Njoroge R , Kikwai G , Odhiambo D , Osita MP , Ouma A , Odour C , Juma B , Ochieng CA , Mutisya I , Ngere I , Dawa J , Osoro E , Njenga MK , Bigogo G , Munyua P , Lo TQ , Hunsperger E , Herman-Roloff A . F1000Res 2021 10 853 Introduction: Urban informal settlements may be disproportionately affected by the COVID-19 pandemic due to overcrowding and other socioeconomic challenges that make adoption and implementation of public health mitigation measures difficult. We conducted a seroprevalence survey in the Kibera informal settlement, Nairobi, Kenya, to determine the extent of SARS-CoV-2 infection. Methods: Members of randomly selected households from an existing population-based infectious disease surveillance (PBIDS) provided blood specimens between 27 (th) November and 5 (th) December 2020. The specimens were tested for antibodies to the SARS-CoV-2 spike protein. Seroprevalence estimates were weighted by age and sex distribution of the PBIDS population and accounted for household clustering. Multivariable logistic regression was used to identify risk factors for individual seropositivity. Results: Consent was obtained from 523 individuals in 175 households, yielding 511 serum specimens that were tested. The overall weighted seroprevalence was 43.3% (95% CI, 37.4 - 49.5%) and did not vary by sex. Of the sampled households, 122(69.7%) had at least one seropositive individual. The individual seroprevalence increased by age from 7.6% (95% CI, 2.4 - 21.3%) among children (<5 years), 32.7% (95% CI, 22.9 - 44.4%) among children 5 - 9 years, 41.8% (95% CI, 33.0 - 51.1%) for those 10-19 years, and 54.9%(46.2 - 63.3%) for adults (≥20 years). Relative to those from medium-sized households (3 and 4 individuals), participants from large (≥5 persons) households had significantly increased odds of being seropositive, aOR, 1.98(95% CI, 1.17 - 1.58), while those from small-sized households (≤2 individuals) had increased odds but not statistically significant, aOR, 2.31 (95% CI, 0.93 - 5.74). Conclusion: In densely populated urban settings, close to half of the individuals had an infection to SARS-CoV-2 after eight months of the COVID-19 pandemic in Kenya. This highlights the importance to prioritize mitigation measures, including COVID-19 vaccine distribution, in the crowded, low socioeconomic settings. |
Genital microbiota of women using a 90 day tenofovir or tenofovir and levonorgestrel intravaginal ring in a placebo controlled randomized safety trial in Kenya.
Dabee S , Mugo N , Mudhune V , McLellan-Lemal E , Peacock S , O'Connor S , Njoroge B , Nyagol B , Thurman AR , Ouma E , Ridzon R , Wiener J , Haugen HS , Gasper M , Feng C , Allen SA , Doncel GF , Jaspan HB , Heffron R . Sci Rep 2022 12 (1) 12040 In a phase-IIa trial, we investigated the influence of 90 days continuous-delivery tenofovir (TFV) intravaginal rings (IVRs) with/without levonorgestrel (LNG) on the genital microbiota of Kenyan women. Eligible women (n = 27; 18-34 years; negative for HIV, sexually transmitted infections, and Amsel-bacterial vaginosis) were randomized 2:2:1 to use of IVRs containing TFV, TFV/LNG, or placebo. Using vaginal wall and IVR swabs at IVR insertion and removal, the genital microbial composition was determined using 16S rRNA gene sequencing. The presence of Candida spp. was determined using qPCR. The vaginal total bacterial burden appeared to decrease with TFV and TFV/LNG IVR use (log(10)0.57 and log(10)0.27 decrease respectively; p > 0.05). The TFV/LNG IVR was more 'stabilizing': 50% of the participants' microbiota community state types remained unchanged and 50% shifted towards higher Lactobacillus abundance. Specifically, TFV/LNG IVR use was accompanied by increased abundances of Lactobacillus gasseri/hominis/johnsonii/taiwanensis (16.3-fold) and L. fermentum/reuteri/vaginalis (7.0-fold; all p < 0.01). A significant shift in the overall microbial α-diversity or β-diversity was not observed for either IVR, and IVR use did not influence Candida spp. prevalence. TFV/LNG and TFV IVRs did not adversely affect the genital microbiota and are safe to use. Our findings support further studies assessing their efficacy in preventing HIV/HSV-2 and unintended pregnancies. |
Identification of a rapidly-spreading triple mutant for high-level metabolic insecticide resistance in Anopheles gambiae provides a real-time molecular diagnostic for anti-malarial intervention deployment.
Njoroge H , Van't Hof A , Oruni A , Pipini D , Nagi SC , Lynd A , Lucas ER , Tomlinson S , Grau-Bove X , McDermott D , Wat'senga FT , Manzambi EZ , Agossa FR , Mokuba A , Irish S , Kabula B , Mbogo C , Bargul J , Paine MJI , Weetman D , Donnelly MJ . Mol Ecol 2022 31 (16) 4307-4318 Studies of insecticide resistance provide insights into the capacity of populations to show rapid evolutionary responses to contemporary selection. Malaria control remains heavily dependent on pyrethroid insecticides, primarily in long lasting insecticidal nets (LLINs). Resistance in the major malaria vectors has increased in concert with the expansion of LLIN distributions. Identifying genetic mechanisms underlying high-level resistance is crucial for the development and deployment of resistance-breaking tools. Using the Anopheles gambiae 1000 genomes (Ag1000g) data we identified a very recent selective sweep in mosquitoes from Uganda which localized to a cluster of cytochrome P450 genes. Further interrogation revealed a haplotype involving a trio of mutations, a nonsynonymous point mutation in Cyp6p4 (I236M), an upstream insertion of a partial Zanzibar-like transposable element (TE) and a duplication of the Cyp6aa1 gene. The mutations appear to have originated recently in An. gambiae from the Kenya-Uganda border, with stepwise replacement of the double-mutant (Zanzibar-like TE and Cyp6p4-236M) with the triple-mutant haplotype (including Cyp6aa1 duplication), which has spread into the Democratic Republic of Congo and Tanzania. The triple-mutant haplotype is strongly associated with increased expression of genes able to metabolise pyrethroids and is strongly predictive of resistance to pyrethroids most notably deltamethrin. Importantly, there was increased mortality in mosquitoes carrying the triple-mutation when exposed to nets co-treated with the synergist piperonyl butoxide (PBO). Frequencies of the triple-mutant haplotype remain spatially variable within countries, suggesting an effective marker system to guide deployment decisions for limited supplies of PBO-pyrethroid co-treated LLINs across African countries. |
Improving hand hygiene practices in two regional hospitals in Kenya using a continuous quality improvement (CQI) approach
Kibira J , Kihungi L , Ndinda M , Wesangula E , Mwangi C , Muthoni F , Augusto O , Owiso G , Ndegwa L , Luvsansharav UO , Bancroft E , Rabinowitz P , Lynch J , Njoroge A . Antimicrob Resist Infect Control 2022 11 (1) 56 BACKGROUND: Hand hygiene (HH) is central in prevention of health care-associated infections. In low resource settings, models to improve HH compliance are needed. We implemented a continuous quality improvement (CQI) program targeting HH in two hospitals in Kenya. OBJECTIVE: To determine the impact of the HH CQI program and identify factors associated with HH compliance between 2018 and 2019. METHODS: A CQI project targeting the improvement of hand hygiene was implemented, including training and mentorship. Data were collected monthly between April 2018 and December 2019 in Thika and Kitale Hospitals. Healthcare workers trained on Infection Prevention and Control (IPC) observed and recorded HH opportunities and subsequent compliance among staff, including nurses, clinicians, and auxiliary staff, using the World Health Organization's "My Five Moments for Hand Hygiene" tool. Covariates were explored using mixed-effects logistic regression with random department-level intercepts. RESULTS: Hand hygiene compliance improved from 27% at baseline to 44% after 21 months. Indication/moment for HH was significantly associated with compliance. Adjusting for site, professional category and department, compliance was higher after a moment of body fluid exposure (aOR 1.43, 95% CI 1.17-1.74, p value < 0.001) and lower before an aseptic procedure (aOR 0.12, 95% CI 0.08-0.17, p value < 0.001) compared to after patient contact. Wearing of gloves often replaced proper HH in surgical departments, which although not significant, had lower compliance compared to departments for internal medicine (aOR 0.93, 95% CI 0.85-1.02). Adjusted HH compliance from all quarters improved from baseline, but comparing each quarter to the previous quarter, the improvement fluctuated over time. CONCLUSION: Training and mentorship on the importance of HH for all moments is needed to improve overall HH compliance. CQI with regular monitoring and feedback of HH performance can be an effective approach in improving HH compliance in public hospitals in Kenya. |
Quality improvement approach for increasing linkage to HIV care and treatment among newly-diagnosed HIV-infected persons in Kenyan urban informal settlements during 20112015
Kegoli S , Ondondo R , Njoroge A , Motoku J , Muriithi C , Ngugi E , Katana A , Waruru A , Weyanga H , Mutisya I . East Afr Med J 2019 96 (2) 2396-2408 Background: Pre-enrollment loss to follow-up and delayed linkage to HIV care and treatment (C&T) of newly-diagnosed HIV-infected individuals are associated with increased morbidity and mortality. Objective: To describe quality improvement approach utilized by Eastern Deanery AIDS Relief Program (EDARP) to increase linkage to HIV C&T of newly-diagnosed HIV-infected individuals. Design: Cross-sectional descriptive assessement of a three-phased continuous quality improvement (CQI) project among 20,972 newly diagnosed HIV patients at 14 EDARP health facilities in Nairobi, Kenya. Phase 1 physically escorting patients to the HIV C&T clinic; Phase 2 use of linkage registers and timely tracking and tracing individuals who missed appointments; Phase 3 use of patient HIV literacy materials. Routine patient data collected during the CQI interventions implemented between October 2011 and September 2015 were analyzed. Results: Implementation of the three CQI phases significantly increased linkage to HIV C&T from 60% at baseline in 2011 to 98% in 2015 (p<0.0001). Factors associated with decreased linkage to HIV C&T through this CQI intervention were: age (adolescents aged 1019 years), [odds ratio (OR) 0.60, 95% confidence interval (CI): 0.51-7.0]; female sex [OR 0.64, (95% CI: 0.59-0.70)] and unemployement [OR 0.84, (95% CI: 0.77-0.92)]. First time tester [OR 1.9, (95% CI: 1.8-2.1)] and divorcees [OR 2.0, (95% CI: 1.7-2.3)], (p<0.001) had increased likelihood of linkage to HIV C&T. Conclusion: Successful linkage to HIV C&T services for newly-diagnosed HIV-infected individuals is achievable through adoption of feasible and low-cost multi-pronged CQI interventions. |
Kenya tuberculosis prevalence survey 2016: Challenges and opportunities of ending TB in Kenya
Enos M , Sitienei J , Ong'ang'o J , Mungai B , Kamene M , Wambugu J , Kipruto H , Manduku V , Mburu J , Nyaboke D , Ngari F , Omesa E , Omale N , Mwirigi N , Okallo G , Njoroge J , Githiomi M , Mwangi M , Kirathe D , Kiplimo R , Ndombi A , Odeny L , Mailu E , Kandie T , Maina M , Kasera K , Mulama B , Mugi B , Weyenga H . PLoS One 2018 13 (12) e0209098 BACKGROUND: We aimed to determine the prevalence of pulmonary TB amongst the adult population (>/=15 years) in 2016 in Kenya. METHOD: A nationwide cross-sectional survey where participants first underwent TB symptom screening and chest x-ray. Subsequently, participants who reported cough >2weeks and/or had a chest x-ray suggestive of TB, submitted sputum specimen for laboratory examination by smear microscopy, culture and Xpert MTB/RIF. RESULT: The survey identified 305 prevalent TB cases translating to a prevalence of 558 [95%CI 455-662] per 100,000 adult population. The highest disease burden was reported among people aged 25-34 years (716 [95% CI 526-906]), males (809 [(95% CI 656-962]) and those who live in urban areas (760 [95% CI 539-981]). Compared to the reported TB notification rate for Kenya in 2016, the prevalence to notification ratio was 2.5:1. The gap between the survey prevalence and notification rates was highest among males, age groups 25-34, and the older age group of 65 years and above. Only 48% of the of the survey prevalent cases reported cough >2weeks. In addition, only 59% of the identified cases had the four cardinal symptoms for TB (cough >/=2 weeks, fever, night sweat and weight loss. However, 88.2% had an abnormal chest x-ray suggestive of TB. The use of Xpert MTB/RIF identified 77.7% of the cases compared to smear microscopy's 46%. Twenty-one percent of the survey participants with respiratory symptoms reported to have sought prior health care at private clinics and chemists. Among the survey prevalent cases who reported TB related symptoms, 64.9% had not sought any health care prior to the survey. CONCLUSION: This survey established that TB prevalence in Kenya is higher than had been estimated, and about half of the those who fall ill with the disease each year are missed. |
Mosquito genomics. Highly evolvable malaria vectors: the genomes of 16 Anopheles mosquitoes.
Neafsey DE , Waterhouse RM , Abai MR , Aganezov SS , Alekseyev MA , Allen JE , Amon J , Arca B , Arensburger P , Artemov G , Assour LA , Basseri H , Berlin A , Birren BW , Blandin SA , Brockman AI , Burkot TR , Burt A , Chan CS , Chauve C , Chiu JC , Christensen M , Costantini C , Davidson VL , Deligianni E , Dottorini T , Dritsou V , Gabriel SB , Guelbeogo WM , Hall AB , Han MV , Hlaing T , Hughes DS , Jenkins AM , Jiang X , Jungreis I , Kakani EG , Kamali M , Kemppainen P , Kennedy RC , Kirmitzoglou IK , Koekemoer LL , Laban N , Langridge N , Lawniczak MK , Lirakis M , Lobo NF , Lowy E , MacCallum RM , Mao C , Maslen G , Mbogo C , McCarthy J , Michel K , Mitchell SN , Moore W , Murphy KA , Naumenko AN , Nolan T , Novoa EM , O'Loughlin S , Oringanje C , Oshaghi MA , Pakpour N , Papathanos PA , Peery AN , Povelones M , Prakash A , Price DP , Rajaraman A , Reimer LJ , Rinker DC , Rokas A , Russell TL , Sagnon N , Sharakhova MV , Shea T , Simao FA , Simard F , Slotman MA , Somboon P , Stegniy V , Struchiner CJ , Thomas GW , Tojo M , Topalis P , Tubio JM , Unger MF , Vontas J , Walton C , Wilding CS , Willis JH , Wu YC , Yan G , Zdobnov EM , Zhou X , Catteruccia F , Christophides GK , Collins FH , Cornman RS , Crisanti A , Donnelly MJ , Emrich SJ , Fontaine MC , Gelbart W , Hahn MW , Hansen IA , Howell PI , Kafatos FC , Kellis M , Lawson D , Louis C , Luckhart S , Muskavitch MA , Ribeiro JM , Riehle MA , Sharakhov IV , Tu Z , Zwiebel LJ , Besansky NJ . Science 2015 347 (6217) 1258522 Variation in vectorial capacity for human malaria among Anopheles mosquito species is determined by many factors, including behavior, immunity, and life history. To investigate the genomic basis of vectorial capacity and explore new avenues for vector control, we sequenced the genomes of 16 anopheline mosquito species from diverse locations spanning ~100 million years of evolution. Comparative analyses show faster rates of gene gain and loss, elevated gene shuffling on the X chromosome, and more intron losses, relative to Drosophila. Some determinants of vectorial capacity, such as chemosensory genes, do not show elevated turnover but instead diversify through protein-sequence changes. This dynamism of anopheline genes and genomes may contribute to their flexible capacity to take advantage of new ecological niches, including adapting to humans as primary hosts. |
The status of HIV testing and counseling in Kenya: results from a nationally representative population-based survey
Ng'ang'a A , Waruiru W , Ngare C , Ssempijja V , Gachuki T , Njoroge I , Oluoch P , Kimanga DO , Maina WK , Mpazanje R , Kim AA . J Acquir Immune Defic Syndr 2014 66 Suppl 1 S27-36 BACKGROUND: HIV testing and counseling (HTC) is essential for successful HIV prevention and treatment programs. The national target for HTC is 80% of the adult population in Kenya. Population-based data to measure progress towards this HTC target are needed to assess the country's changing needs for HIV prevention and treatment. METHODS: In 2012-2013, we conducted a national HIV survey among Kenyans aged 18 months to 64 years. Respondents aged 15-64 years were administered a questionnaire that collected information on demographics, HIV testing behavior, and self-reported HIV status. Blood samples were collected for HIV testing in a central laboratory. Participants were offered home-based testing and counseling to learn their HIV status in the home and point-of-care CD4 testing if they tested HIV-positive. RESULTS: Of 13,720 adults who were interviewed, 71.6% [95% confidence interval (CI): 70.2 to 73.1] had been tested for HIV. Among those, 56.1% (95% CI: 52.8 to 59.4) had been tested in the past year, 69.4% (95% CI: 68.0 to 70.8) had been tested more than once, and 37.2% (95% CI: 35.7 to 38.8) had been tested with a partner. Fifty-three percent (95% CI: 47.6 to 58.7) of HIV-infected persons were unaware of their infection. Overall 9874 (72.0%) of participants accepted home-based HIV testing and counseling; 4.1% (95% CI: 3.3 to 4.9) tested HIV-positive, and of those, 42.5% (95% CI 31.4 to 53.6) were in need of immediate treatment for their HIV infection but not receiving it. CONCLUSIONS: HIV testing rates have nearly reached the national target for HTC in Kenya. However, knowledge of HIV status among HIV-infected persons remains low. HTC needs to be expanded to reach more men and couples, and strategies are needed to increase repeat testing for persons at risk for HIV infection. |
Gestational diabetes mellitus and risk of childhood overweight and obesity in offspring: a systematic review
Kim SY , England JL , Sharma JA , Njoroge T . Exp Diabetes Res 2011 2011 541308 We systematically reviewed research examining the association between gestational diabetes (GDM) and childhood overweight and obesity. We identified studies from three sources: (1) a PubMed search of articles published between January 1990-January 2011, (2) reference lists of publications from the PubMed search, and (3) reference lists of review articles. We included studies that examined GDM separately from pregestational diabetes and childhood overweight or obesity defined as BMI > 85th or 95th percentile. A total of 12 studies were included in the systematic review. Crude odds ratios for the relationship between GDM and childhood overweight or obesity ranged from 0.7 to 6.3; in 8 studies, the associations were not statistically significant. In only 3 studies were results adjusted for any confounders; in the 2 that adjusted for prepregnancy obesity, the GDM and childhood overweight or obesity associations were attenuated and not statistically significant after adjustment. This paper demonstrates inconsistent evidence of an association between GDM and offspring overweight and obesity due to the methodological limitations of existing studies. Recommendations for future research are presented, which address methodological challenges. |
Determinants of condom use among female sex workers in Kenya: a case-crossover analysis
Gallo MF , Warner L , Bell AJ , Bukusi EA , Sharma A , Njoroge B , Ngugi E , Jamieson DJ , Eschenbach DA . J Womens Health (Larchmt) 2011 20 (5) 733-8 BACKGROUND: We evaluated predictors of consistent condom use among female sex workers (FSWs), a core group for controlling the spread of HIV. METHODS: In an analysis of data collected in 2004-2005 from 140 Kenyan FSWs who completed questionnaires administered during a baseline study visit and three bimonthly follow-up visits, we used a case-crossover design to identify predictors of consistent condom use during all coital acts in the preceding 2 weeks, overall and by partner type. RESULTS: Participants (n=140) completed the baseline visit and 390 bimonthly follow-up visits. Alcohol use during sex was negatively associated with consistent condom use with helping partners (defined as regular sex partners to whom the woman could go for help or support if needed) (adjusted odds ratio [AOR], 2.6, 95% confidence interval [CI] 1.0-6.5) but not associated with condom use with other partners. Coital frequency was associated with condom use with other partners only. Women who reported 1-5 (AOR 11.0, 95% CI 4.3-28.3) or 6-9 recent coital acts (AOR 3.8, 95% CI 1.7-8.8) with other partners were more likely to report consistent condom use with those partners than were women who reported ≥10 acts. Having a recent partner delay payment was inversely associated with consistent condom use with helping, other, or all partners. CONCLUSIONS: Correlates of consistent condom use differed by partner type. By using a case-crossover design, we were able to identify potentially modifiable factors associated with consistent condom use by FSWs who used condoms consistently with a given partner type during some periods but not others. |
Intravaginal practices among female sex workers in Kibera, Kenya
Gallo MF , Sharma A , Bukusi EA , Njoroge B , Nguti R , Jamieson DJ , Bell AJ , Eschenbach DA . Sex Transm Infect 2010 86 (4) 318-22 OBJECTIVES: To assess vaginal cleansing and lubricant use among female sex workers (FSW) in Kenya participating in a 6-month, prospective study of the acceptability of the use of the diaphragm. METHODS: The study is based on 140 FSW in Nairobi, who completed 140 baseline visits and 390 bi-monthly follow-up visits. Participants were instructed to wear the diaphragm for all coital acts during follow-up and to refrain from vaginal cleansing while wearing the diaphragm. Logistic regression was used to identify predictors of recent vaginal cleansing to 'tighten' the vagina reported at baseline; recent vaginal cleansing to prevent infection reported at baseline; recent vaginal cleansing with the diaphragm in place reported during follow-up; and recent use of oil-based lubricant during coitus reported at baseline. RESULTS: At baseline, 99% of women reported vaginal cleansing in the previous 2 weeks for purposes of hygiene or to remove evidence of past coitus. Approximately 41% of women also reported cleansing in the past 2 weeks to 'tighten' the vagina. Women reported vaginal cleansing with the diaphragm in place in the past 2 weeks at 14% of follow-up visits in which the diaphragm was used. Predictors of such cleansing included young age, 6-month study visit, being divorced or widowed and higher educational level. CONCLUSIONS: While vaginal cleansing is a modifiable behaviour, given that cleansing for hygiene was almost universal among this study population at baseline and that more women reported cleansing while wearing the diaphragm as the study progressed, the complete eradication of the practice would probably be difficult. |
Diaphragm for STI and HIV prevention: is it a safe method for women at high risk?
Njoroge B , Gallo MF , Sharma A , Bukusi EA , Nguti R , Bell AJ , Jamieson DJ , Williams D , Eschenbach DA . Sex Transm Dis 2010 37 (6) 382-5 Female sex workers (n = 140) were enrolled in a 6-month acceptability trial of the diaphragm. We randomized a subset (n = 40) to receive colposcopies after 1 month of diaphragm use or after 1 month of observation before commencing diaphragm use. Adverse events were mild in nature. Frequency of colposcopic findings did not differ between women randomized to immediate versus delayed diaphragm use (P = 0.25). |
Gestational diabetes mellitus: all Asians are not alike
Chu SY , Abe K , Hall LR , Kim SY , Njoroge T , Qin C . Prev Med 2009 49 265-8 OBJECTIVE: To estimate the prevalence of gestational diabetes mellitus (GDM) prevalence estimates for subgroups of US Asian and Pacific Islander (API) women by using data from 2005 and 2006 birth certificates. METHODS: Using 2005-2006 natality files from states that implemented the revised 2003 US birth certificate, which differentiates between GDM and preexisting diabetes (2005: 12 states; 2006: 19 states), we calculated age-adjusted GDM prevalence estimates for API mothers who delivered singleton infants. RESULTS: Among 3,108,877 births, US APIs had a substantially higher age-adjusted prevalence of GDM (6.3%) than whites (3.8%), blacks (3.5%), or Hispanics (3.6%). Among API subgroups, age-adjusted GDM prevalence varied significantly, from 3.7% among women of Japanese descent to 8.6% among women of Asian Indian descent. Foreign-born APIs had significantly higher GDM rates than US-born APIs except among women of Japanese and Korean ancestry. CONCLUSION: Overall, US API women have the highest risk for GDM among all US racial/ethnic groups. However, APIs are a heterogeneous group by genetic background, culture, and diet and other lifestyle behaviors. Our findings imply that, whenever possible, API subgroups should be evaluated separately in health research. |
- Page last reviewed:Feb 1, 2024
- Page last updated:May 13, 2024
- Content source:
- Powered by CDC PHGKB Infrastructure