Last data update: Mar 17, 2025. (Total: 48910 publications since 2009)
Records 1-19 (of 19 Records) |
Query Trace: Ng'eno B[original query] |
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Impact of enhanced adherence counselling on viral re-suppression among adolescents and young persons with persistent viremia
Wasilwa A , Amadi E , Ramadhani HO , Lascko T , Ndaga A , Makokha V , Abuya K , Oneya D , Nyabiage L , Ng'eno C . Aids 2024 OBJECTIVE: Kenya ART guidelines recommend three sessions of enhanced adherence counselling (EAC) following detectable viral load (VL). The objective of this study was to assess completion of EAC sessions and factors associated with viral re-suppression amongst adolescents and young persons (AYPs) with persistent viremia in Western Kenya. METHODS: A retrospective analysis of routinely collected data abstracted from VL registers was done. AYP with persistent viremia (consecutive VL ≥ 1,000 copies/ml) between October 2017 to September 2019 were followed for 12 months; those with >1 follow-up VL results were analyzed. EAC was satisfactory if ≥3 sessions attended, barriers identified and addressed. Morisky scores 0 and ≥1 indicated optimal and sub-optimal adherence respectively. Logistic regression models were used to assess predictors of viral load suppression (VLS). RESULTS: Of 124 AYPs with persistent viremia, 118(95.2%) had documented follow up VL results and 119(96.0%) completed three EAC sessions. Overall, 55(47%) clients re-suppressed during the study period. AYPs who had satisfactory EAC sessions had higher odds of achieving VLS (odds ratio [OR] = 3.7, 95% confidence interval [CI]: 1.6-8.1). Similarly, AYPs with an optimal adherence had eight times (OR = 8.1, 95%CI: 3.5-18.5) higher odds of achieving VLS, and those who were suppressed at 6 months post ART initiation had higher odds of achieving VLS at 12-months (OR = 2.5, 95%CI:1.1-5.8). CONCLUSION: Satisfactory EAC sessions and optimal ART adherence was strongly associated with viral re-suppression among AYPs with persistent viremia. Continued support to EAC intervention is critical to improve treatment outcome among AYP living with HIV. |
Factors associated with enrollment into differentiated service delivery model among adults living with HIV in Kenya
Lavoie MC , Koech E , Blanco N , Wangusi R , Jumbe M , Kimonye F , Ndaga A , Ndichu G , Makokha V , Awuor P , Momanyi E , Oyuga R , Nzyoka S , Mutisya I , Joseph R , Miruka F , Musingila P , Stafford KA , Lascko T , Ngunu C , Owino E , Kiplangat A , Kepha A , Ng'eno C . AIDS 2023 37 (15) 2409-2417 INTRODUCTION: Differentiated service delivery (DSD) such as multi-month dispensing (MMD) aims to provide client-centered HIV services, while reducing the workload within health facilities. We assessed individual and facility factors associated with receiving >3MMD and switching from ≥3MMD back to <3MMD in Kenya. METHODS: We conducted a retrospective cohort study of clients eligible for DSD between July 2017 and December 2019. A random sample of clients eligible for DSD was selected from 32 randomly selected facilities located in Nairobi, Kisii, and Migori counties. We used a multilevel Poisson regression model to assess the factors associated with receiving ≥3MMD, and with switching from ≥3MMD back to <3MMD. RESULTS: A total of 3,501 clients eligible for ≥3MMD were included in our analysis: 1,808 (51.6%) were receiving care in Nairobi County and the remaining 1,693 (48.4%) in Kisii and Migori counties. Overall, 65% of clients were enrolled in ≥3MMD at the time of entry into the cohort. In the multivariable model, younger age (20-24; 25-29; 30-34 vs. 50 or more years) and switching ART regimen was significantly associated with a lower likelihood of ≥3MMD uptake. Additionally, factors associated with a higher likelihood of enrollment in ≥3MMD included receiving DTG- vs. EFV-based ART regimen (aRR: 1.10; 95% CI: 1.05-1.15). CONCLUSION: Client-level characteristics are associated with being on ≥3MMD and the likelihood of switching from ≥3MMD to <3MMD. Monitoring DSD enrollment across different populations is critical to successfully implementing these models continually. |
Dynamic incidence of typhoid fever over a 10-year period (2010-2019) in Kibera, an urban informal settlement in Nairobi, Kenya
Ng'eno E , Lind M , Audi A , Ouma A , Oduor C , Munywoki PK , Agogo GO , Odongo G , Kiplangat S , Wamola N , Osita MP , Mugoh R , Ochieng C , Omballa V , Mogeni OD , Mikoleit M , Fields BS , Montgomery JM , Gauld J , Breiman RF , Juma B , Hunsperger E , Widdowson MA , Bigogo G , Mintz ED , Verani JR . Am J Trop Med Hyg 2023 109 (1) 22-31 Typhoid fever burden can vary over time. Long-term data can inform prevention strategies; however, such data are lacking in many African settings. We reexamined typhoid fever incidence and antimicrobial resistance (AMR) over a 10-year period in Kibera, a densely populated urban informal settlement where a high burden has been previously described. We used data from the Population Based Infectious Diseases Surveillance platform to estimate crude and adjusted incidence rates and prevalence of AMR in nearly 26,000 individuals of all ages. Demographic and healthcare-seeking information was collected through household visits. Blood cultures were processed for patients with acute fever or lower respiratory infection. Between 2010 and 2019, 16,437 participants were eligible for blood culture and 11,848 (72.1%) had a culture performed. Among 11,417 noncontaminated cultures (96.4%), 237 grew Salmonella enterica serovar Typhi (2.1%). Overall crude and adjusted incidences were 95 and 188 cases per 100,000 person-years of observation (pyo), respectively. Annual crude incidence varied from 144 to 233 between 2010 and 2012 and from 9 to 55 between 2013 and 2018 and reached 130 per 100,000 pyo in 2019. Children 5-9 years old had the highest overall incidence (crude, 208; adjusted, 359 per 100,000 pyo). Among isolates tested, 156 of 217 were multidrug resistant (resistant to chloramphenicol, ampicillin, and trimethoprim/sulfamethoxazole [71.9%]) and 6 of 223 were resistant to ciprofloxacin (2.7%). Typhoid fever incidence resurged in 2019 after a prolonged period of low rates, with the highest incidence among children. Typhoid fever control measures, including vaccines, could reduce morbidity in this setting. |
Scale-up of HIV index testing in an urban population: experiences and achievements from Nairobi County, Kenya
Joel JN , Awuor P , Blanco N , Lavoie MC , Lascko T , Ngunu C , Mwangi J , Mutisya I , Ng'eno C , Wangusi R , Koech E . Trop Med Int Health 2022 28 (2) 116-125 OBJECTIVE: To describe the implementation strategies of the index testing program across Nairobi County in Kenya, assess outcomes along the HIV index testing cascade (acceptance, elicitation ratio, HIV positivity, and linkage to treatment), and assess annual changes along the HIV index testing cascade during the first two years of implementation. METHODS: Retrospective analysis of programmatic aggregate data collected from October 2017 to September 2019 after the roll-out of index testing services in 48 health facilities in Nairobi County. Proportions and ratios were calculated for acceptance, elicitation ratio, testing uptake, and HIV positivity. We compared these outcomes between years using a chi-squared test, Fisher's exact test, or Wilcoxon sign test, and we assessed trends using the Mann-Kendall test. RESULTS: Testing among eligible partners increased from 42.4% (1,471/3,470) to 74.9% (6,114/8,159) in the general population, and the positivity yield remained high across both years (25.2% in year 1 and 24.1% in year 2). Index testing positivity yield remained significantly higher than other testing modalities (24.3% versus 1.3%, p<0.001). The contribution of index testing services to the total number of HIV-positive individuals identified increased from 7.5% in the first year to 28.6% in the second year (p<0.001). More men were tested, but the positivity yield was higher among women (30.0%) and those aged 50 years or older (32.4%). Testing eligible partners in key populations decreased from 52.4% (183/349) to 40.7% (109/268) (p=0.674); however, the HIV positivity yield increased from 8.6% to 23.9% (p<0.001) by the second year of implementation. The HIV positivity yield from index testing remained higher than other testing modalities (14% vs. 0.9%, p<0.001) for key populations. CONCLUSION: Index testing was well-accepted and effective in identifying individuals living with HIV in a Kenyan urban setting across both general populations and key populations. Ongoing adaptations to the strategies deployed as part of index testing services helped improve most of the outcomes along the index testing cascade. This article is protected by copyright. All rights reserved. |
Molecular characterization of circulating Salmonella Typhi strains in an urban informal settlement in Kenya.
Ochieng C , Chen JC , Osita MP , Katz LS , Griswold T , Omballa V , Ng'eno E , Ouma A , Wamola N , Opiyo C , Achieng L , Munywoki PK , Hendriksen RS , Freeman M , Mikoleit M , Juma B , Bigogo G , Mintz E , Verani JR , Hunsperger E , Carleton HA . PLoS Negl Trop Dis 2022 16 (8) e0010704 ![]() A high burden of Salmonella enterica subspecies enterica serovar Typhi (S. Typhi) bacteremia has been reported from urban informal settlements in sub-Saharan Africa, yet little is known about the introduction of these strains to the region. Understanding regional differences in the predominant strains of S. Typhi can provide insight into the genomic epidemiology. We genetically characterized 310 S. Typhi isolates from typhoid fever surveillance conducted over a 12-year period (2007-2019) in Kibera, an urban informal settlement in Nairobi, Kenya, to assess the circulating strains, their antimicrobial resistance attributes, and how they relate to global S. Typhi isolates. Whole genome multi-locus sequence typing (wgMLST) identified 4 clades, with up to 303 pairwise allelic differences. The identified genotypes correlated with wgMLST clades. The predominant clade contained 290 (93.5%) isolates with a median of 14 allele differences (range 0-52) and consisted entirely of genotypes 4.3.1.1 and 4.3.1.2. Resistance determinants were identified exclusively in the predominant clade. Determinants associated with resistance to aminoglycosides were observed in 245 isolates (79.0%), sulphonamide in 243 isolates (78.4%), trimethoprim in 247 isolates (79.7%), tetracycline in 224 isolates (72.3%), chloramphenicol in 247 isolates (79.6%), β-lactams in 239 isolates (77.1%) and quinolones in 62 isolates (20.0%). Multidrug resistance (MDR) determinants (defined as determinants conferring resistance to ampicillin, chloramphenicol and cotrimoxazole) were found in 235 (75.8%) isolates. The prevalence of MDR associated genes was similar throughout the study period (2007-2012: 203, 76.3% vs 2013-2019: 32, 72.7%; Fisher's Exact Test: P = 0.5478, while the proportion of isolates harboring quinolone resistance determinants increased (2007-2012: 42, 15.8% and 2013-2019: 20, 45.5%; Fisher's Exact Test: P<0.0001) following a decline in S. Typhi in Kibera. Some isolates (49, 15.8%) harbored both MDR and quinolone resistance determinants. There were no determinants associated with resistance to cephalosporins or azithromycin detected among the isolates sequenced in this study. Plasmid markers were only identified in the main clade including IncHI1A and IncHI1B(R27) in 226 (72.9%) isolates, and IncQ1 in 238 (76.8%) isolates. Molecular clock analysis of global typhoid isolates and isolates from Kibera suggests that genotype 4.3.1 has been introduced multiple times in Kibera. Several genomes from Kibera formed a clade with genomes from Kenya, Malawi, South Africa, and Tanzania. The most recent common ancestor (MRCA) for these isolates was from around 1997. Another isolate from Kibera grouped with several isolates from Uganda, sharing a common ancestor from around 2009. In summary, S. Typhi in Kibera belong to four wgMLST clades one of which is frequently associated with MDR genes and this poses a challenge in treatment and control. |
Making voluntary medical male circumcision services sustainable: Findings from Kenya's pilot models, baseline and year 1
Davis SM , Owuor N , Odoyo-June E , Wambua J , Omanga E , Lukobo M , Laube C , Mwandi Z , Suraratdecha C , Kioko UM , Rotich W , Kataka J , Ng'eno C , Mohan D , Toledo C , Aoko A , Anyango J , Oneya D , Orenjuro K , Mgamb E , Serrem K , Juma A . PLoS One 2021 16 (6) e0252725 Voluntary medical male circumcision is a crucial HIV prevention program for men in sub-Saharan Africa. Kenya is one of the first countries to achieve high population coverage and seek to transition the program to a more sustainable structure designed to maintain coverage while making all aspects of service provision domestically owned and implemented. Using pre-defined metrics, we created and evaluated three models of circumcision service delivery (static, mobile and mixed) to identify which had potential for sustaining high circumcision coverage among 10-14-year-olds group, a historically high-demand and accessible age group, at the lowest possible cost. We implemented each model in two distinct geographic areas, one in Siaya and the other in Migori county, and assessed multiple aspects of each model's sustainability. These included numerical achievements against targets designed to reach 80% coverage over two years; quantitative expenditure outcomes including unit expenditure plus its primary drivers; and qualitative community perception of program quality and sustainability based on Likert scale. Outcome values at baseline were compared with those for year one of model implementation using bivariate linear regression, unpaired t-tests and Wilcoxon rank tests as appropriate. Across models, numerical target achievement ranged from 45-140%, with the mixed models performing best in both counties. Unit expenditures varied from approximately $57 in both countries at baseline to $44-$124 in year 1, with the lowest values in the mixed and static models. Mean key informant perception scores generally rose significantly from baseline to year 1, with a notable drop in the area of community engagement. Consistently low scores were in the aspects of domestic financing for service provision. Sustainability-focused circumcision service delivery models can successfully achieve target volumes at lower unit expenditures than existing models, but strategies for domestic financing remain a crucial challenge to address for long-term maintenance of the program. |
Approaches to transitioning women into and out of prevention of mother-to-child transmission of HIV services for continued ART: a systematic review
Phillips TK , Teasdale CA , Geller A , Ng'eno B , Mogoba P , Modi S , Abrams EJ . J Int AIDS Soc 2021 24 (1) e25633 INTRODUCTION: Women living with HIV are required to transition into the prevention of mother-to-child transmission of HIV (PMTCT) services when they become pregnant and back to ART services after delivery. Transition can be a vulnerable time when many women are lost from HIV care yet there is little guidance on the optimal transition approaches to ensure continuity of care. We reviewed the available evidence on existing approaches to transitioning women into and out of PMTCT, outcomes following transition and factors influencing successful transition. METHODS: We searched PubMed and SCOPUS, as well as abstracts from international HIV-focused meetings, from January 2006 to July 2020. Studies were included that examined three points of transition: pregnant women already on ART into PMTCT (transition 1), pregnant women living with HIV not yet on ART into treatment services (transition 2) and postpartum women from PMTCT into general ART services after delivery (transition 3). Results were grouped and reported as descriptions of transition approach, comparison of outcomes following transition and factors influencing successful transition. RESULTS & DISCUSSION: Out of 1809 abstracts located, 36 studies (39 papers) were included in this review. Three studies included transition 1, 26 transition 2 and 17 transition 3. Approaches to transition were described in 26 studies and could be grouped into the provision of information at the point of transition (n = 8), strengthened communication or linkage of data between services (n = 4), use of transition navigators (n = 12), and combination approaches (n = 4). Few studies were designed to directly assess transition and only nine compared outcomes between transition approaches, with substantial heterogeneity in study design, setting and outcomes. Four themes were identified in 25 studies reporting on factors influencing successful transition: fear, knowledge and preparedness, clinic characteristics and the transition requirements and process. CONCLUSIONS: This review highlights that, despite the need for women to transition into and out of PMTCT services for continued ART in many settings, there is very limited evidence on optimal transition approaches. Ongoing operational research is required to identify sustainable and acceptable transition approaches and service delivery models that support continuity of HIV care during and after pregnancy. |
Assessment of routine screening of pediatric contacts of adults with tuberculosis disease in Tanzania
Emerson C , Ng'eno B , Ngowi B , Pals S , Kohi W , Godwin M , Date A , Modi S . Public Health Action 2019 9 (4) 148-152 Setting: Ten selected healthcare facilities in Tanzania, March-April 2016. Objective(s): To assess the implementation of screening among pediatric contacts of adults with tuberculosis (TB) disease. Design(s): Using a mixed-methods approach, we conducted a questionnaire study among sputum smear-positive adult TB patients and abstracted data from their patient cards to assess the implementation of a child contact management (CCM) intervention. We also conducted in-depth interviews with healthcare workers (HCWs) to solicit their views on clinical practices and challenges in CCM. Result(s): A total of 141 adult smear-positive TB patients reported 396 children living in households; detailed information on 346 (87.4%) was available. Only 37 (10.7%) children were clinically assessed for TB, 5 (13.5%) were diagnosed with TB, and 22 started on isoniazid preventive therapy (IPT) (59.0%). Of the 320 children whose caregivers responded to whether their children had undergone human immunodeficiency virus (HIV) testing, 55 (17.2%) had been tested and one (1.8%) was HIV-positive. Forty-one HCWs described passive CCM without use of contact or IPT registers. Conclusion(s): We identified gaps in the implementation of TB screening, IPT provision, and HIV testing in pediatric contacts of adults with sputum smear-positive TB. Systematic efforts, including increasing HCW training and educating the community, may improve implementation. |
Pathogen surveillance in the informal settlement, Kibera, Kenya, using a metagenomics approach.
Hendriksen RS , Lukjancenko O , Munk P , Hjelmso MH , Verani JR , Ng'eno E , Bigogo G , Kiplangat S , Oumar T , Bergmark L , Roder T , Neatherlin JC , Clayton O , Hald T , Karlsmose S , Pamp SJ , Fields B , Montgomery JM , Aarestrup FM . PLoS One 2019 14 (10) e0222531 ![]() ![]() BACKGROUND: Worldwide, the number of emerging and re-emerging infectious diseases is increasing, highlighting the importance of global disease pathogen surveillance. Traditional population-based methods may fail to capture important events, particularly in settings with limited access to health care, such as urban informal settlements. In such environments, a mixture of surface water runoff and human feces containing pathogenic microorganisms could be used as a surveillance surrogate. METHOD: We conducted a temporal metagenomic analysis of urban sewage from Kibera, an urban informal settlement in Nairobi, Kenya, to detect and quantify bacterial and associated antimicrobial resistance (AMR) determinants, viral and parasitic pathogens. Data were examined in conjunction with data from ongoing clinical infectious disease surveillance. RESULTS: A large variation of read abundances related to bacteria, viruses, and parasites of medical importance, as well as bacterial associated antimicrobial resistance genes over time were detected. Significant increased abundances were observed for a number of bacterial pathogens coinciding with higher abundances of AMR genes. Vibrio cholerae as well as rotavirus A, among other virus peaked in several weeks during the study period whereas Cryptosporidium spp. and Giardia spp, varied more over time. CONCLUSION: The metagenomic surveillance approach for monitoring circulating pathogens in sewage was able to detect putative pathogen and resistance loads in an urban informal settlement. Thus, valuable if generated in real time to serve as a comprehensive infectious disease agent surveillance system with the potential to guide disease prevention and treatment. The approach may lead to a paradigm shift in conducting real-time global genomics-based surveillance in settings with limited access to health care. |
Caregiver perspectives on TB case-finding and HIV clinical services for children diagnosed with TB in Tanzania
Emerson C , Ndakidemi E , Ngowi B , Medley A , Ng'eno B , Godwin M , Ntinginya N , Carpenter D , Kohi W , Modi S . AIDS Care 2019 32 (4) 1-5 Caregivers of children with tuberculosis (TB) and HIV play a critical role in seeking healthcare for their children. To assess the perspectives of caregivers of pediatric TB patients, we conducted 76 in-depth interviews at 10 TB clinics in 5 districts of Tanzania in March 2016. We assessed how the child received their TB diagnosis, the decision-making process around testing the child for HIV, and the process of linking the child to HIV treatment in the event of an HIV diagnosis. Caregivers suspected TB due to cases in their family, or the child being ill and not improving. Most caregivers noted delays before confirmation of a TB diagnosis and having to visit multiple facilities before a diagnosis. Once diagnosed, some caregivers reported challenges administering TB medications due to lack of pediatric formulations. Reasons for accepting HIV testing included recurrent illness and HIV symptoms, history of HIV in the family, and recommendation of the clinical provider. Caregivers described a relatively seamless process for linking their child to HIV treatment, highlighting the success of TB/HIV integration efforts. The multiple clinic visits required prior to TB diagnosis suggests the need for additional training and sensitization of healthcare workers and better TB diagnostic tools. |
Health care worker perspectives on TB case finding and HIV services among pediatric TB patients in Tanzania
Ndakidemi E , Emerson C , Medley A , Ngowi B , Ng'eno B , Munuo G , Kohi W , Modi S . Int J Tuberc Lung Dis 2019 23 (7) 811-816 BACKGROUND: Tuberculosis (TB) and human immunodeficiency virus (HIV) infection in children are of concern due to the high morbidity and mortality they engender. Tanzania is working to improve TB and HIV case identification and treatment, as well as linkage of TB and HIV care in pediatric patients.METHODS: In-depth interviews were conducted in March 2016 at 10 high TB burden clinics in five districts of Tanzania to identify the barriers to pediatric TB diagnosis and HIV care. Health care workers (HCWs) at TB clinics who provided informed consent were administered interviews which were analyzed.RESULTS: Of 41 HCWs interviewed, 26 reported receiving pediatric TB training. Barriers to TB diagnosis included low community awareness, stigma and late presentation to the clinic. Barriers to HIV testing included children attending the TB clinic with someone who was not their parent/guardian and shortages of HIV rapid test kits. HCWs stressed the need for improved community education because it was perceived that some caregivers did not understand the importance of prompt TB and HIV treatment in children (although most were eager for a resolution of their child's illness).CONCLUSIONS: Efforts are needed to ensure effective TB and HIV diagnosis and treatment of children, provision of broader HCW and community education, enhanced TB-HIV contact tracing, and ensuring a continuous supply of HIV rapid test kits. |
Modes of HIV transmission among adolescents and young adults aged 10-24 years in Kenya
Ng'eno BN , Kellogg TA , Kim AA , Mwangi A , Mwangi M , Wamicwe J , Rutherford GW . Int J STD AIDS 2018 29 (8) 956462418758115 Understanding how HIV is acquired can inform interventions to prevent infection. We constructed a risk profile of 10-24 year olds participating in the 2012 Kenya AIDS Indicator Survey and classified them as perinatally infected if their biological mother was infected with HIV or had died, or if their father was infected with HIV or had died (for those lacking mother's data). The remaining were classified as sexually infected if they had sex, and the remaining as parenterally infected if they had a blood transfusion. Overall, 84 (1.6%) of the 5298 10-24 year olds tested HIV positive; 9 (11%) were aged 10-14 and 75 (89%) 15-24 years. Five (56%) 10-14 year olds met criteria for perinatal infection; 4 (44%) did not meet perinatal, sexual or parenteral transmission criteria and parental HIV status was not established. Of the 75 HIV-infected, 15 to 24 year olds, 5 (7%) met perinatal transmission, 63 (84%) sexual and 2 (3%) parenteral criteria; 5 (7%) were unclassified. Perinatal transmission likely accounted for 56% and sexual transmission for 84% of infections among 10-14 year olds and 15-24 year olds, respectively. Although our definitions may have introduced some uncertainty, and with the number of infected participants being small, our findings suggest that mixed modes of HIV transmission exist among adolescents and young people. |
Comparison of methods to assess consumption of micronutrient powders among young children in Nepal
Ng'eno BN , Perrine CG , Subedi GR , Mebrahtu S , Dahal P , Jefferds MED . Food Nutr Bull 2017 38 (3) 441-446 BACKGROUND: Assessing micronutrient powder (MNP) consumption is the key for monitoring program performance; no gold standard exists for assessing consumption in nutrition programs. OBJECTIVE: To compare estimates of MNP consumption assessed by maternal report versus observed unopened MNP sachets in the household. METHODS: Cross-sectional household surveys of children aged 6 to 23 months were conducted to assess an MNP project in Nepal; eligible children received 60 sachets per distribution. Mothers reported the number of sachets consumed and showed unused sachets. Directly observed difference (DOD) of MNP consumption was calculated by subtracting the number of observed unopened sachets from 60. Spearman correlation coefficient, categories of MNP consumption, and end digit preference were assessed. RESULTS: A total of 205 mothers did not show remaining unopened sachets despite reporting that all were not consumed. For the remaining 605 children, median consumption was 60.0 sachets by DOD and maternal report; the correlation coefficient was 0.91. With consumption grouped into categories of 0 to 14, 15 to 29, 30 to 44, and 45 to 60 sachets, the percent categorized into the same groupings by DOD and maternal report was 100%, 80.6%, 80.7%, and 91.2%, respectively. Excluding those who consumed 60 sachets, 16.9% and 8.0% by report and 14.2% and 6.1% DOD, ended with 0 and 5, respectively. CONCLUSION: Had the observation of unused sachets been used alone to assess MNP consumption, 205 children would not have been assessed. Estimates of MNP consumption by DOD and maternal report were similar in this population with high intake adherence. |
Pregnant adolescents living with HIV: What we know, what we need to know, where we need to go
Callahan T , Modi S , Swanson J , Ng'eno B , Broyles LN . J Int AIDS Soc 2017 20 (1) 1-4 INTRODUCTION: HIV-infected pregnant and breastfeeding adolescents are a particularly vulnerable group that require special attention and enhanced support to achieve optimal maternal and infant outcomes. The objective of this paper is to review published evidence about antenatal care (ANC) service delivery and outcomes for HIV-infected pregnant adolescents in low-income country settings, identify gaps in knowledge and programme services and highlight the way forward to improve clinical outcomes of this vulnerable group. DISCUSSION: Emerging data from programmes in sub-Saharan Africa highlight that HIV-infected pregnant adolescents have poorer prevention of mother-to-child HIV transmission (PMTCT) service outcomes, including lower PMTCT service uptake, compared to HIV-infected pregnant adults. In addition, the limited evidence available suggests that there may be higher rates of mother-to-child HIV transmission among infants of HIV-infected pregnant adolescents. CONCLUSIONS: While the reasons for the inferior outcomes among adolescents in ANC need to be further explored and addressed, there is sufficient evidence that immediate operational changes are needed to address the unique needs of this population. Such changes could include integration of adolescent-friendly services into PMTCT settings or targeting HIV-infected pregnant adolescents with enhanced retention and follow-up activities. |
High prevalence of vitamin B12 deficiency and no folate deficiency in young children in Nepal
Ng'eno BN , Perrine CG , Whitehead RD , Subedi GR , Mebrahtu S , Dahal P , Jefferds ME . Nutrients 2017 9 (1) Many children in low- and middle-income countries may have inadequate intake of vitamin B12 and folate; data confirming these inadequacies are limited. We used biochemical, demographic, behavioral and anthropometric data to describe the folate and vitamin B12 concentrations among six- to 23-month-old Nepalese children. Vitamin B12 (serum B12 < 150 pmol/L) and folate deficiencies (red blood cell (RBC) folate < 226.5 nmol/L) were assessed. We used logistic regression to identify predictors of vitamin B12 deficiency. The vitamin B12 geometric mean was 186 pmol/L; 30.2% of children were deficient. The mean RBC folate concentration was 13,612 nmol/L; there was no deficiency. Factors associated with vitamin B12 deficiency included: (a) age six to 11 months (adjusted odds ratio (aOR) 1.51; 95% confidence interval (CI): 1.18, 1.92) or 12-17 months (aOR 1.38; 95% CI: 1.10, 1.72) compared to 18-23 months; (b) being stunted (aOR 1.24; 95% CI: 1.03, 1.50) compared to not being stunted; (c) and not eating animal-source foods (aOR 1.85; 95% CI: 1.42, 2.41) compared to eating animal-source foods the previous day. There was a high prevalence of vitamin B12 deficiency, but no folate deficiency. Improving early feeding practices, including the consumption of rich sources of vitamin B12, such as animal-source foods and fortified foods, may help decrease deficiency. |
Environmental transmission of typhoid fever in an urban slum
Akullian A , Ng'eno E , Matheson AI , Cosmas L , Macharia D , Fields B , Bigogo G , Mugoh M , John-Stewart G , Walson JL , Wakefield J , Montgomery JM . PLoS Negl Trop Dis 2015 9 (12) e0004212 BACKGROUND: Enteric fever due to Salmonella Typhi (typhoid fever) occurs in urban areas with poor sanitation. While direct fecal-oral transmission is thought to be the predominant mode of transmission, recent evidence suggests that indirect environmental transmission may also contribute to disease spread. METHODS: Data from a population-based infectious disease surveillance system (28,000 individuals followed biweekly) were used to map the spatial pattern of typhoid fever in Kibera, an urban informal settlement in Nairobi Kenya, between 2010-2011. Spatial modeling was used to test whether variations in topography and accumulation of surface water explain the geographic patterns of risk. RESULTS: Among children less than ten years of age, risk of typhoid fever was geographically heterogeneous across the study area (p = 0.016) and was positively associated with lower elevation, OR = 1.87, 95% CI (1.36-2.57), p <0.001. In contrast, the risk of typhoid fever did not vary geographically or with elevation among individuals less than 6b ten years of age. CONCLUSIONS: Our results provide evidence of indirect, environmental transmission of typhoid fever among children, a group with high exposure to fecal pathogens in the environment. Spatially targeting sanitation interventions may decrease enteric fever transmission. |
Burden of HIV infection among children aged 18 months to 14 years in Kenya: results from a nationally representative population-based cross-sectional survey
Ng'eno B , Mwangi A , Ng'ang'a L , Kim AA , Waruru A , Mukui I , Ngugi EW , Rutherford GW . J Acquir Immune Defic Syndr 2014 66 Suppl 1 S82-8 BACKGROUND: In Kenya, mathematical models estimate that there are approximately 220,000 children aged less than 15 years infected with HIV. We analyzed data from the second Kenya AIDS Indicator Survey (KAIS 2012) to estimate the prevalence of HIV infection among children aged 18 months to 14 years. METHODS: KAIS 2012 was a nationally representative 2-stage cluster sample household survey. We studied children aged 18 months to 14 years whose parents or guardians answered questions pertaining to their children by interview. Blood specimens were collected for HIV serology and viral load measurement. RESULTS: We identified 5162 children who were eligible for the study. Blood was obtained for 3681 (71.3%) children. Among child participants, 16.4% had been tested for HIV infection in the past, and among children with parents or guardians who self-reported HIV-positive status, 52.9% had been tested for HIV infection. Twenty-eight (0.9%) children tested HIV-positive in the survey. Of these, 11 had been previously diagnosed with HIV infection before the survey. All 11 children were in HIV care and receiving cotrimoxazole; 8 were on antiretorivral therapy (ART). Among those on ART, 4 were virologically suppressed. CONCLUSIONS: HIV causes a substantial burden of disease in the Kenyan pediatric population. Although most children who had been diagnosed with HIV before the survey were engaged in care and treatment, they represented less than half of HIV-infected children identified in the survey. Future efforts should focus on identifying infected children and getting them into care and on suppressive ART as early as possible. |
Contraceptive practices and fertility desires among HIV-infected and uninfected women in Kenya: results from a nationally representative study
Ngugi EW , Kim AA , Nyoka R , Nganga L , Mukui I , Ng'eno B , Rutherford GW . J Acquir Immune Defic Syndr 2014 66 Suppl 1 S75-81 BACKGROUND: Prevention of unplanned pregnancies is a critical element in the prevention of mother-to-child-transmission (PMTCT) of HIV, but its potential has not been fully realized. We assessed the utilization of family planning (FP) and fertility desires among women of reproductive age by HIV status. METHODS: We selected a nationally representative sample of households using a stratified two-stage cluster design and surveyed women aged 15-49 years. We administered questionnaires and examined predictors of current use of FP methods and desire for children among sexually active women with known HIV infection and women who were HIV-uninfected. RESULTS: Of 3,583 respondents, 68.2% were currently using FP and 57.7% did not desire children in the future. Among women who did not desire children in the future, 70.9% reported that they were using FP, including 68.7% of women with known HIV infection and 71.0% of women who were HIV-uninfected. Women with known HIV infection had similar odds of using FP as women with no HIV infection (odds ratio [OR] 1.12, 95% confidence interval [CI] 0.81-1.54). Women with no HIV infection had significantly higher adjusted odds of desiring future children (adjusted OR [aOR] 2.27, 95% CI 1.31 - 3.93) than women with known HIV infection. CONCLUSIONS: There is unmet need for FP for HIV-infected women, underscoring a gap in the national PMTCT strategy. Efforts to empower HIV-infected women to prevent unintended pregnancies should lead to expanded access to contraceptive methods and take into account women's reproductive intentions. |
Understanding the contribution of common childhood illnesses and opportunistic infections to morbidity and mortality in children living with HIV in resource-limited settings
Modi S , Chiu A , Ng'eno B , Kellerman SE , Sugandhi N , Muhe L . AIDS 2013 27 Suppl 2 S159-67 OBJECTIVE: Although antiretroviral treatment (ART) has reduced the incidence of HIV-related opportunistic infections among children living with HIV, access to ART remains limited for children, especially in resource-limited settings. This paper reviews current knowledge on the contribution of opportunistic infections and common childhood illnesses to morbidity and mortality in children living with HIV, highlights interventions known to improve the health of children, and identifies research gaps for further exploration. DESIGN AND METHODS: Literature review of peer-reviewed articles and abstracts combined with expert opinion and operational experience. RESULTS: Morbidity and mortality due to opportunistic infections has decreased in both developed and resource-limited countries. However, the burden of HIV-related infections remains high, especially in sub-Saharan Africa, where the majority of HIV-infected children live. Limitations in diagnostic capacity in resource-limited settings have resulted in a relative paucity of data on opportunistic infections in children. Additionally, the reliance on clinical diagnosis means that opportunistic infections are often confused with common childhood illnesseswhich also contribute to excess morbidity and mortality in these children. Although several preventive interventions have been shown to decrease opportunistic infection-related mortality, implementation of many of these interventions remains inconsistent. CONCLUSIONS: In order to reduce opportunistic infection-related mortality, early ART must be expanded, training for front-line clinicians must be improved, and additional research is needed to improve screening and diagnostic algorithms. |
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