40 Works

Seasonal changes in mosquito population densities in irrigated and non-irrigated areas in Bura, Tana River County, Kenya (2013-2014)

R. Sang, J. Lutomiah, J.F. Lindahl, D. Grace & B. Bett
These data comprise apparent densities, species and sex and of mosquitos collected in irrigated and non-irrigated areas in Bura, Tana River County Kenya, between September 2013 and November 2014. Sampling was repeated four times over the period to cover the wet season, dry season, irrigation season and fallow periods. Mosquitoes were trapped using carbon dioxide-baited (CDC) light traps. Mosquitoes harvested from each of these traps were immobilized using 99.5% triethyleamine (Sigma-Aldrich, St. Louis, Missouri) and...

Data from: They are likely to be there: using a family-centered index-testing approach to identify HIV-positive children in Kenya

Jayne Lewis-Kulzer, Nicollate Okoko, Kirsten Ohe, Margaret Mburu, Hellen Muttai, Lisa Abuogi, Elizabeth Bukusi, Craig Cohen & Jeremy Penner
In Kenya, only half of children with an HIV-positive parent have been tested for HIV. The effectiveness of a family-centred index-testing approach to identify children (0-14 years) living with HIV was examined. A retrospective clinical record review was conducted among adult index patients newly enrolled in HIV care between May–July 2015 and family outcomes were followed through May 2016 at 60 high-volume clinics in western Kenya. HIV testing uptake and results, health facility level, enrollment...

Larval site characteristics of mosquito Aedes aegypti in La Lope, Gabon

Siyang Xia, Hany K. M. Dweck, Joel Lutomiah, Rosemary Sang, Carolyn S. McBride, Noah H. Rose, Diego Ayala & Jeffrey R. Powell
This dataset is described and analyzed in the paper: "Xia, S., Dweck, H. K. M., Lutomiah, J., Sang, R., McBride, C. S., Rose, N. H., Ayala, D., & Powell, J. R. (2021). Larval sites of the mosquito Aedes aegypti formosus in forest and domestic habitats in Africa and the potential association with oviposition evolution. Ecology and Evolution, 00, 1– 17. https://doi.org/10.1002/ece3.8332" The mosquito Ae. aegypti is a major vector of several arboviral diseases. In Africa,...

Schistosoma mansoni IgG antibody response and Kato-Katz infection among pre-school aged children in Mbita, Western Kenya 2012-2014

Benjamin Arnold, Henry Kanyi, Sammy Njenga, Fredrick Rawago, Jeffrey Priest, W. Evan Secor, Patrick Lammie, Kimberly Won & Maurice Odiere
We compared serological measures of transmission based on antibody response to S. mansoni soluble egg antigen (SEA) with stool-based measures of infection among 3,663 preschool-age children in an area endemic for S. mansoni in western Kenya. We estimated force of infection among children using the seroconversion rate examined how it varied geographically and by age.

Clinical malaria incidence and health seeking pattern in geographically heterogeneous landscape of western Kenya

Wilfred Ouma Otambo, Patrick O. Onyango, Kevin Ochwedo, Julius Olumeh, Shirley A. Onyango, Pauline Orondo, Harrysone Atieli, Ming-Chieh Lee, Chloe Wang, Daibin Zhong, Andrew Githeko, Guofa Zhou, John Githure, Collins Ouma, Guiyun Yan & James Kazura
Abstract Background Malaria remains a public health problem in Kenya despite sustained interventions deployed by the government. One of the major impediments to effective malaria control is a lack of accurate diagnosis and effective treatment. This study was conducted to assess clinical malaria incidence and treatment seeking profiles of febrile cases in western Kenya. Methods Active case detection of malaria was carried out in three eco-epidemiologically distinct zones topologically characterized as lakeshore, hillside, and highland...

Data from: Modelling vaccination strategies against Rift Valley fever in livestock in Kenya: model code

John M. Gachohi, M. Kariuki Njenga, Phillip M. Kitala, Bernard K. Bett, Bernard Bett & Philip Kitala
The impacts of vaccination on the transmission of Rift Valley fever virus (RVFV) have not been evaluated. We have developed a RVFV transmission model comprising two hosts -- cattle as a separate host and sheep and goats as one combined host (herein after referred to as sheep) -- and two vectors -- Aedes species (spp) and Culex spp -- and used it to predict the impacts of: (1) reactive vaccination implemented at various levels of...

Comparison of the costs of HPV testing through Community health campaigns versus Home-based testing in rural western Kenya: A micro-costing study

Easter Olwanda, James Khan, Yujung Choi, Jessica Islam & Megan Huchko
Objectives: To estimate the cost of HPV-based screening through Community health campaigns (CHCs) and home-based testing. Setting: Community health campaigns (CHCs) and home-based testing in six communities in rural western Kenya. Participants: CHCs and home-based screening reached 2297 and 1002 women aged 25 to 65 years respectively. Outcome measures: Outcome measures were overall cost per woman screened achieved through the CHCs and home-based testing, and the cost per woman for each activity comprising the screening...

Pregnancy outcomes in facility deliveries in Kenya and Uganda: A large cross-sectional analysis of maternity registers illuminating opportunities for mortality prevention

Peter Waiswa, Brennan V. Higgins, Paul Mubiri, Leah Kirumbi, Elizabeth Butrick, Rikita Merai, Nancy L. Sloan, Dilys Walker & Kenya
Introduction As facility-based deliveries increase globally, maternity registers offer a promising way of documenting pregnancy outcomes and understanding opportunities for perinatal mortality prevention. This study aims to contribute to global quality improvement efforts by characterizing facility-based pregnancy outcomes in Kenya and Uganda including maternal, neonatal, and fetal outcomes at the time of delivery and neonatal discharge outcomes using strengthened maternity registers. Methods Cross sectional data were collected from previously strengthened maternity registers at 23 facilities...

Additional file 1 of Evaluating the effects of supplementing ward nurses on quality of newborn care in Kenyan neonatal units: protocol for a prospective workforce intervention study

Abdulazeez Imam, David Gathara, Jalemba Aluvaala, Michuki Maina & Mike English
Additional file 1.

Additional file 2 of Evaluating the effects of supplementing ward nurses on quality of newborn care in Kenyan neonatal units: protocol for a prospective workforce intervention study

Abdulazeez Imam, David Gathara, Jalemba Aluvaala, Michuki Maina & Mike English
Additional file 2.

Data from: Performance of five food regimes on Anopheles gambiae senso stricto larval rearing to adult emergence in Insectary

Happiness S. Kivuyo, Paschal H. Mbazi, Denis S. Kisika, Stephen Munga, Susan F. Rumisha, Felister M. Urasa & Eliningaya J. Kweka
Background: Rearing of Anopheles gambiae s.s mosquitoes in insectary with quality cheap food sources is of paramount importance for better and healthy colony. This study evaluated larval survival and the development rate of aquatic stages of An.gambiae s.s under five food regimes; tetramin fish food (a standard insectary larval food), maize pollen, Cerelac, green filamentous algae and dry powdered filamentous algae. Methods: Food materials were obtained from different sources, cerelac was made locally, fresh filamentous...

Additional file 1 of Clinical malaria incidence and health seeking pattern in geographically heterogeneous landscape of western Kenya

Wilfred Ouma Otambo, Patrick O. Onyango, Kevin Ochwedo, Julius Olumeh, Shirley A. Onyango, Pauline Orondo, Harrysone Atieli, Ming-Chieh Lee, Chloe Wang, Daibin Zhong, Andrew Githeko, Guofa Zhou, John Githure, Collins Ouma, Guiyun Yan & James Kazura
Additional file 1: Table S1. Independent variable importance associated with decision to seek treatment. Table S2. Factors associated with decision to seek treatment.

Clinical malaria incidence and health seeking pattern in geographically heterogeneous landscape of western Kenya

Wilfred Ouma Otambo, Patrick O. Onyango, Kevin Ochwedo, Julius Olumeh, Shirley A. Onyango, Pauline Orondo, Harrysone Atieli, Ming-Chieh Lee, Chloe Wang, Daibin Zhong, Andrew Githeko, Guofa Zhou, John Githure, Collins Ouma, Guiyun Yan & James Kazura
Abstract Background Malaria remains a public health problem in Kenya despite sustained interventions deployed by the government. One of the major impediments to effective malaria control is a lack of accurate diagnosis and effective treatment. This study was conducted to assess clinical malaria incidence and treatment seeking profiles of febrile cases in western Kenya. Methods Active case detection of malaria was carried out in three eco-epidemiologically distinct zones topologically characterized as lakeshore, hillside, and highland...

Changes in concentrations of cervicovaginal immune mediators across the menstrual cycle: a systematic review and meta-analysis of individual patient data

Sean M. Hughes, Claire N. Levy, Ronit Katz, Erica M. Lokken, Melis N. Anahtar, Melissa Barousse Hall, Frideborg Bradley, Philip E. Castle, Valerie Cortez, Gustavo F. Doncel, Raina Fichorova, Paul L. Fidel, Keith R. Fowke, Suzanna C. Francis, Mimi Ghosh, Loris Y. Hwang, Mariel Jais, Vicky Jespers, Vineet Joag, Rupert Kaul, Jordan Kyongo, Timothy Lahey, Huiying Li, Julia Makinde, Lyle R. McKinnon … & Florian Hladik
Abstract Background Hormonal changes during the menstrual cycle play a key role in shaping immunity in the cervicovaginal tract. Cervicovaginal fluid contains cytokines, chemokines, immunoglobulins, and other immune mediators. Many studies have shown that the concentrations of these immune mediators change throughout the menstrual cycle, but the studies have often shown inconsistent results. Our understanding of immunological correlates of the menstrual cycle remains limited and could be improved by meta-analysis of the available evidence. Methods...

Additional file 3 of Changes in concentrations of cervicovaginal immune mediators across the menstrual cycle: a systematic review and meta-analysis of individual patient data

Sean M. Hughes, Claire N. Levy, Ronit Katz, Erica M. Lokken, Melis N. Anahtar, Melissa Barousse Hall, Frideborg Bradley, Philip E. Castle, Valerie Cortez, Gustavo F. Doncel, Raina Fichorova, Paul L. Fidel, Keith R. Fowke, Suzanna C. Francis, Mimi Ghosh, Loris Y. Hwang, Mariel Jais, Vicky Jespers, Vineet Joag, Rupert Kaul, Jordan Kyongo, Timothy Lahey, Huiying Li, Julia Makinde, Lyle R. McKinnon … & Florian Hladik
Additional file 3. Code and data. IPD from co-authors who agreed to share it, results of all analyses presented in the paper, and R code files necessary to reproduce the analysis and figures.

Additional file 1 of Evaluating the effects of supplementing ward nurses on quality of newborn care in Kenyan neonatal units: protocol for a prospective workforce intervention study

Abdulazeez Imam, David Gathara, Jalemba Aluvaala, Michuki Maina & Mike English
Additional file 1.

Additional file 2 of Evaluating the effects of supplementing ward nurses on quality of newborn care in Kenyan neonatal units: protocol for a prospective workforce intervention study

Abdulazeez Imam, David Gathara, Jalemba Aluvaala, Michuki Maina & Mike English
Additional file 2.

Additional file 4 of Changes in concentrations of cervicovaginal immune mediators across the menstrual cycle: a systematic review and meta-analysis of individual patient data

Sean M. Hughes, Claire N. Levy, Ronit Katz, Erica M. Lokken, Melis N. Anahtar, Melissa Barousse Hall, Frideborg Bradley, Philip E. Castle, Valerie Cortez, Gustavo F. Doncel, Raina Fichorova, Paul L. Fidel, Keith R. Fowke, Suzanna C. Francis, Mimi Ghosh, Loris Y. Hwang, Mariel Jais, Vicky Jespers, Vineet Joag, Rupert Kaul, Jordan Kyongo, Timothy Lahey, Huiying Li, Julia Makinde, Lyle R. McKinnon … & Florian Hladik
Additional file 4. Concentration and forest plots for each individual immune mediator. Concentration plots - Each symbol shows the concentration of the indicated immune mediator in a single sample. Each study is plotted separately. Lines connect samples from the same participant; in some cases participants provided multiple samples in the same phase, in which case multiple symbols within the same phase may be connected. Pale grey symbols are below the lower limit of detection and...

Additional file 1 of Changes in concentrations of cervicovaginal immune mediators across the menstrual cycle: a systematic review and meta-analysis of individual patient data

Sean M. Hughes, Claire N. Levy, Ronit Katz, Erica M. Lokken, Melis N. Anahtar, Melissa Barousse Hall, Frideborg Bradley, Philip E. Castle, Valerie Cortez, Gustavo F. Doncel, Raina Fichorova, Paul L. Fidel, Keith R. Fowke, Suzanna C. Francis, Mimi Ghosh, Loris Y. Hwang, Mariel Jais, Vicky Jespers, Vineet Joag, Rupert Kaul, Jordan Kyongo, Timothy Lahey, Huiying Li, Julia Makinde, Lyle R. McKinnon … & Florian Hladik
Additional file 1. Supporting methods documents. PRISMA-P and PRISMA-IPD checklists, database search strategies, manuscript screening form, risk of bias instrument, and strength of evidence tool.

Additional file 5 of Changes in concentrations of cervicovaginal immune mediators across the menstrual cycle: a systematic review and meta-analysis of individual patient data

Sean M. Hughes, Claire N. Levy, Ronit Katz, Erica M. Lokken, Melis N. Anahtar, Melissa Barousse Hall, Frideborg Bradley, Philip E. Castle, Valerie Cortez, Gustavo F. Doncel, Raina Fichorova, Paul L. Fidel, Keith R. Fowke, Suzanna C. Francis, Mimi Ghosh, Loris Y. Hwang, Mariel Jais, Vicky Jespers, Vineet Joag, Rupert Kaul, Jordan Kyongo, Timothy Lahey, Huiying Li, Julia Makinde, Lyle R. McKinnon … & Florian Hladik
Additional file 5: Figure S1. Assessment of publication bias. A Funnel plots. Symbols show the effect of the menstrual cycle (x-axis) and the standard error of that effect (y-axis, reversed). Each symbol shows an individual study. Vertical solid line shows no effect. Vertical dashed line shows the meta-estimate of effect. Diagonal dashed lines enclose the region expected to include 95% of studies based on the estimated meta-effect and the standard errors. B Results of Egger’s...

Data from: Deep sequencing reveals extensive variation in the gut microbiota of wild mosquitoes from Kenya.

Jewelna Osei-Poku, Charles M. Mbogo, William J. Palmer & Francis M. Jiggins
The mosquito midgut is a hostile environment that vector-borne parasites must survive in order to be transmitted. Commensal bacteria in the midgut can reduce the ability of mosquitoes to transmit disease, either by having direct anti-parasite effects or by stimulating basal immune responses of the insect host. As different bacteria have different effects on parasite development, the composition of the bacterial community in the mosquito gut is likely to affect the probability of disease transmission....

Data from: Microbiome sharing between children, livestock and household surfaces in western Kenya

Emily Mosites, Matt Sammons, Elkanah Otiang, Alexander Eng, Ceclia Noecher, Ohad Manor, Sarah Hilton, Samuel M. Thmbi, Clayton Onyango, Gemina Garland-Lewis, Douglas R. Call, M. Kariuki Njenga, Judith N. Wasserheit, Jennifer A. Zambriski, Judd L. Walson, Guy H. Palmer, Joel Montgomery, Elhanan Borenstein, Richard Omore, Peter M. Rabinowitz, Samuel M. Thumbi & Cecilia Noecker
The gut microbiome community structure and development are associated with several health outcomes in young children. To determine the household influences of gut microbiome structure, we assessed microbial sharing within households in western Kenya by sequencing 16S rRNA libraries of fecal samples from children and cattle, cloacal swabs from chickens, and swabs of household surfaces. Among the 156 households studied, children within the same household significantly shared their gut microbiome with each other, although we...

Data from: Multiple evolutionary origins of Trypanosoma evansi in Kenya

Christine M. Kamidi, Norah P. Saarman, Kirstin B. Dion, Paul O. Mireji, Collins Ouma, Grace Murilla, Serap Aksoy, Achim Schnaufer, Adalgisa Caccone & Kirstin Dion
Trypanosoma evansi is the parasite causing surra, a form of trypanosomiasis in camels and other livestock, and a serious economic burden in Kenya and many other parts of the world. Trypanosoma evansi transmission can be sustained mechanically by tabanid and Stomoxys biting flies, whereas the closely related African trypanosomes T. brucei brucei and T. b. rhodesiense require cyclical development in tsetse flies (genus Glossina) for transmission. In this study, we investigated the evolutionary origins of...

Data from: Examining the human infectious reservoir for Plasmodium falciparum malaria in areas of differing transmission intensity

Bronner P. Gonçalves, Melissa C. Kapulu, Patrick Sawa, Wamdaogo M. Guelbéogo, Alfred B. Tiono, Lynn Grignard, Will Stone, Joel Hellewell, Kjerstin Lanke, Guido J. H. Bastiaens, John Bradley, Issa Nébié, Joyce M. Ngoi, Robin Oriango, Dora Mkabili, Maureen Nyaurah, Janet Midega, Dyann F. Wirth, Kevin Marsh, Thomas S. Churcher, Philip Bejon, Sodiomon B. Sirima, Chris Drakeley & Teun Bousema
A detailed understanding of the human infectious reservoir is essential for improving malaria transmission-reducing interventions. Here we report a multi-regional assessment of population-wide malaria transmission potential based on 1209 mosquito feeding assays in endemic areas of Burkina Faso and Kenya. Across both sites, we identified 39 infectious individuals. In high endemicity settings, infectious individuals were identifiable by research-grade microscopy (92.6%; 25/27), whilst one of three infectious individuals in the lowest endemicity setting was detected by...

Additional file 4 of Changes in concentrations of cervicovaginal immune mediators across the menstrual cycle: a systematic review and meta-analysis of individual patient data

Sean M. Hughes, Claire N. Levy, Ronit Katz, Erica M. Lokken, Melis N. Anahtar, Melissa Barousse Hall, Frideborg Bradley, Philip E. Castle, Valerie Cortez, Gustavo F. Doncel, Raina Fichorova, Paul L. Fidel, Keith R. Fowke, Suzanna C. Francis, Mimi Ghosh, Loris Y. Hwang, Mariel Jais, Vicky Jespers, Vineet Joag, Rupert Kaul, Jordan Kyongo, Timothy Lahey, Huiying Li, Julia Makinde, Lyle R. McKinnon … & Florian Hladik
Additional file 4. Concentration and forest plots for each individual immune mediator. Concentration plots - Each symbol shows the concentration of the indicated immune mediator in a single sample. Each study is plotted separately. Lines connect samples from the same participant; in some cases participants provided multiple samples in the same phase, in which case multiple symbols within the same phase may be connected. Pale grey symbols are below the lower limit of detection and...

Registration Year

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Affiliations

  • Kenya Medical Research Institute
    40
  • London School of Hygiene & Tropical Medicine
    20
  • University of Nairobi
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  • University of Washington
    13
  • Massachusetts General Hospital
    12
  • Fred Hutchinson Cancer Research Center
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  • Karolinska University Hospital
    12
  • George Washington University
    12
  • University of Vermont
    12
  • University of Minnesota
    12