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Employment (1)

Kenya Medical Research Institute (KEMRI): Nairobi, KE

1991 to present | Research Scientist
Employment
Source: Self-asserted source
Sammy Njenga

Education and qualifications (1)

Liverpool School of Tropical Medicine: Liverpool, Liverpool, GB

2001 to 2005 | PhD
Education
Source: Self-asserted source
Sammy Njenga

Works (50 of 92)

Items per page:
Page 1 of 2

Triple-drug therapy with ivermectin, diethylcarbamazine and albendazole for the acceleration of lymphatic filariasis elimination in Kenya: Programmatic implementation and results of the first impact assessment

PLOS Neglected Tropical Diseases
2024-07-08 | Journal article
DOI: 10.1371/journal.pntd.0011942
Contributors: Sammy M. Njenga; Sasisekhar Bennuru; Henry Kanyi; Collins Okoyo; Edward Githinji; Cassian Mwatele; Sultani H. Matendechero; Wyckliff P. Omondi; Patrick N. Gitahi; Chrispin Owaga et al.
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Crossref

Triple-drug therapy with ivermectin, diethylcarbamazine and albendazole for the acceleration of lymphatic filariasis elimination in Kenya: Programmatic implementation and results of the first impact surveillance

2024-01-30 | Preprint
DOI: 10.1101/2024.01.30.24301765
Contributors: Sammy M. Njenga; Henry Kanyi; Collins Okoyo; Edward Githinji; Cassian Mwatele; Hadley S. Matendechero; Wyckliff P. Omondi; Patrick N. Gitahi; Chrispin Owaga; Joyce K. Onsongo et al.
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Crossref

Comparative Safety Surveillance of Triple (IDA) Versus Dual Therapy (DA) in Mass Drug Administration for Elimination of Lymphatic Filariasis in Kenya: A Cohort Event Monitoring Study

Drug Safety
2023-10 | Journal article
DOI: 10.1007/s40264-023-01338-9
Contributors: Christabel Khaemba; Abbie Barry; Wyckliff P. Omondi; Elvis Kirui; Margaret Oluka; Gurumurthy Parthasarathi; Sammy M. Njenga; Anastacia Guantai; Eleni Aklillu
Source: check_circle
Crossref

Geographic pair-matching in large-scale cluster randomized trials

2023-05-01 | Preprint
DOI: 10.1101/2023.04.30.23289317
Contributors: Benjamin F. Arnold; Francois Rerolle; Christine Tedijanto; Sammy M. Njenga; Mahbubur Rahman; Ayse Ercumen; Andrew Mertens; Amy Pickering; Audrie Lin; Charles D. Arnold et al.
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Crossref

Integrated survey of helminthic neglected tropical diseases and comparison of two mosquito sampling methods for lymphatic filariasis molecular xenomonitoring in the River Galana area, Kilifi County, coastal Kenya

PLOS ONE
2022-12-09 | Journal article
DOI: 10.1371/journal.pone.0278655
Contributors: Sammy M. Njenga; Hesham M. Al-Mekhlafi; Henry M. Kanyi; Cassian M. Mwatele; Dunstan A. Mukoko; Moses J. Bockarie; Louise A. Kelly-Hope
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Crossref

Comparison of quantitative polymerase chain reaction, Kato-Katz and circulating cathodic antigen rapid test for the diagnosis of Schistosoma mansoni infection: A cross-sectional study in Kirinyaga County, Kenya

Current Research in Parasitology & Vector-Borne Diseases
2021 | Journal article
DOI: 10.1016/j.crpvbd.2021.100029
Contributors: Benard Chieng; Collins Okoyo; Elses Simiyu; Paul Gichuki; Cassian Mwatele; Stella Kepha; Sammy Njenga; David Mburu
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Crossref

Diagnostics to support elimination of lymphatic filariasis—Development of two target product profiles

PLOS Neglected Tropical Diseases
2021-11-15 | Journal article
DOI: 10.1371/journal.pntd.0009968
Contributors: Kimberly Y. Won; Eileen Devaney; Katherine Gass; Marco Biamonte; Daniel Argaw Dagne; Camilla Ducker; Christopher Hanna; Achim Hoerauf; Patrick J. Lammie; Sammy M. Njenga et al.
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Crossref

Safety and Tolerability of Mass Diethylcarbamazine and Albendazole Administration for the Elimination of Lymphatic Filariasis in Kenya: An Active Surveillance Study

Pharmaceuticals
2021-03 | Journal article | Author
DOI: 10.3390/ph14030264
Contributors: Christabel Khaemba; Abbie Barry; Wyckliff Omondi; Kefa Bota; Sultani Matendechero; Cecilia Wandera; Fred Siyoi; Elvis Kirui; Margaret Oluka; Pamela Nambwa et al.
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Multidisciplinary Digital Publishing Institute

Fine-scale heterogeneity in Schistosoma mansoni force of infection measured through antibody response

Proceedings of the National Academy of Sciences
2020-09-15 | Journal article
DOI: 10.1073/pnas.2008951117
Contributors: Benjamin F. Arnold; Henry Kanyi; Sammy M. Njenga; Fredrick O. Rawago; Jeffrey W. Priest; W. Evan Secor; Patrick J. Lammie; Kimberly Y. Won; Maurice R. Odiere
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Crossref

Prevalence and risk factors of Schistosoma mansoni infection among children under two years of age in Mbita, Western Kenya

PLOS Neglected Tropical Diseases
2020-08-25 | Journal article
DOI: 10.1371/journal.pntd.0008473
Contributors: Miho Sassa; Mike J. Doenhoff; Evans A. Chadeka; Ngetich B. Cheruiyot; Mio Tanaka; Taeko Moriyasu; Satoshi Kaneko; Sammy M. Njenga; Sharon E. Cox; Shinjiro Hamano
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Crossref

Effects of single and integrated water, sanitation, handwashing, and nutrition interventions on child soil-transmitted helminth and Giardia infections: A cluster-randomized controlled trial in rural Kenya

PLOS Medicine
2019-06-26 | Journal article
DOI: 10.1371/journal.pmed.1002841
Contributors: Amy J. Pickering; Peter Byass; Sammy M. Njenga; Lauren Steinbaum; Jenna Swarthout; Audrie Lin; Benjamin F. Arnold; Christine P. Stewart; Holly N. Dentz; MaryAnne Mureithi et al.
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Crossref

Multiplex serologic testing within a cross-sectional lymphatic filariasis sentinel site survey in coastal Kenya reveals community-level differences in IgG antibody responses to parasitic diseases and vaccines

bioRxiv
2019-04-19 | Preprint
Source: Self-asserted source
Sammy Njenga

Effects, equity, and cost of school-based and community-wide treatment strategies for soil-transmitted helminths in Kenya: a cluster-randomised controlled trial

Lancet
2019-04-18 | Journal article
DOI: 10.1016/s0140-6736(18)32591-1
Part of ISSN: 0140-6736
Source: Self-asserted source
Sammy Njenga

A high-intensity cluster of Schistosoma mansoni infection around Mbita causeway, western Kenya: a confirmatory cross-sectional survey

Trop Med Health
2019-04-15 | Journal article
DOI: 10.1186/s41182-019-0152-y
Part of ISSN: 1349-4147
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 3)‎

A multi-country study of the economic burden of dengue fever based on patient-specific field surveys in Burkina Faso, Kenya, and Cambodia

PLoS Negl Trop Dis
2019-02-28 | Journal article
DOI: 10.1371/journal.pntd.0007164
Part of ISSN: 1935-2735
Source: Self-asserted source
Sammy Njenga

Molecular identification of zoonotic hookworms in dogs from four counties of Kenya

J Helminthol
2019-02-28 | Journal article
DOI: 10.1017/s0022149x1900018x
Part of ISSN: 0022-149X
Part of ISSN: 1475-2697
Source: Self-asserted source
Sammy Njenga

Effect of a sanitation intervention on soil-transmitted helminth prevalence and concentration in household soil: A cluster-randomized controlled trial and risk factor analysis

PLoS Negl Trop Dis
2019-02-11 | Journal article
DOI: 10.1371/journal.pntd.0007180
Part of ISSN: 1935-2735
Source: Self-asserted source
Sammy Njenga

Results of a national school-based deworming programme on soil-transmitted helminths infections and schistosomiasis in Kenya: 2012–2017

Parasit Vectors
2019-02-07 | Journal article
DOI: 10.1186/s13071-019-3322-1
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga

Comparing the performance of circulating cathodic antigen and Kato-Katz techniques in evaluating Schistosoma mansoni infection in areas with low prevalence in selected counties of Kenya: a cross-sectional study

2018-12 | Journal article
DOI: 10.1186/s12889-018-5414-9
Part of ISSN: 1471-2458
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

High-density lipoprotein suppresses tumor necrosis factor alpha production by mycobacteria-infected human macrophages

2018-12 | Journal article
DOI: 10.1038/s41598-018-24233-1
Part of ISSN: 2045-2322
Source: Self-asserted source
Sammy Njenga

Sickle Cell and α+-Thalassemia Traits Influence the Association between Ferritin and Hepcidin in Rural Kenyan Children Aged 14–26 Months

J Nutr
2018-12-01 | Journal article
DOI: 10.1093/jn/nxy229
Part of ISSN: 0022-3166
Part of ISSN: 1541-6100
Source: Self-asserted source
Sammy Njenga

Integrating water, sanitation, handwashing, and nutrition interventions to reduce child soil-transmitted helminth and Giardia infections: a cluster-randomized controlled trial in rural Kenya

2018-11-09 | Other
DOI: 10.1101/464917
Contributors: Amy J. Pickering; Sammy M. Njenga; Lauren Steinbaum; Jenna Swarthout; Audrie Lin; Benjamin F. Arnold; Christine P. Stewart; Holly N. Dentz; MaryAnne Mureithi; Benard Chieng et al.
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Crossref

Modulation of immune responses by Plasmodium falciparum infection in asymptomatic children living in the endemic region of Mbita, western Kenya

2018-06 | Journal article
DOI: 10.1016/j.parint.2018.01.001
Part of ISSN: 1383-5769
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Impact of Mothers’ Schistosomiasis Status During Gestation on Children’s IgG Antibody Responses to Routine Vaccines 2 Years Later and Anti-Schistosome and Anti-Malarial Responses by Neonates in Western Kenya

2018-06-18 | Journal article
DOI: 10.3389/fimmu.2018.01402
Part of ISSN: 1664-3224
Source: Self-asserted source
Sammy Njenga

Mosquito arbovirus survey in selected areas of Kenya: detection of insect-specific virus

Trop Med Health
2018-06-04 | Journal article
DOI: 10.1186/s41182-018-0095-8
Part of ISSN: 1349-4147
Source: Self-asserted source
Sammy Njenga

Effects of water quality, sanitation, handwashing, and nutritional interventions on diarrhoea and child growth in rural Kenya: a cluster-randomised controlled trial

2018-03 | Journal article
DOI: 10.1016/s2214-109x(18)30005-6
Part of ISSN: 2214-109X
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Diagnostic tools for soil-transmitted helminths control and elimination programs: A pathway for diagnostic product development

2018-03-01 | Journal article
DOI: 10.1371/journal.pntd.0006213
Part of ISSN: 1935-2735
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Evaluating dengue burden in Africa in passive fever surveillance and seroprevalence studies: protocol of field studies of the Dengue Vaccine Initiative

2018-01 | Journal article
DOI: 10.1136/bmjopen-2017-017673
Part of ISSN: 2044-6055
Part of ISSN: 2044-6055
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

High prevalence of helminths infection and associated risk factors among adults living in a rural setting, central Kenya: a cross-sectional study

2017-12 | Journal article
DOI: 10.1186/s41182-017-0055-8
Part of ISSN: 1349-4147
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Impact of single annual treatment and four-monthly treatment for hookworm and Ascaris lumbricoides, and factors associated with residual infection among Kenyan school children

Infect Dis Poverty
2017-12 | Journal article
DOI: 10.1186/s40249-017-0244-z
Part of ISSN: 2049-9957
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Sources of variability in the measurement of Ascaris lumbricoides infection intensity by Kato-Katz and qPCR

2017-12 | Journal article
DOI: 10.1186/s13071-017-2164-y
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Spatial distribution and risk factors of Schistosoma haematobium and hookworm infections among schoolchildren in Kwale, Kenya

2017-09-01 | Journal article
DOI: 10.1371/journal.pntd.0005872
Part of ISSN: 1935-2735
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Multiplex Serologic Assessment of Schistosomiasis in Western Kenya: Antibody Responses in Preschool Aged Children as a Measure of Reduced Transmission

2017-06-07 | Journal article
DOI: 10.4269/ajtmh.16-0665
Part of ISSN: 0002-9637
Part of ISSN: 1476-1645
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Detecting and enumerating soil-transmitted helminth eggs in soil: New method development and results from field testing in Kenya and Bangladesh

2017-04-05 | Journal article
DOI: 10.1371/journal.pntd.0005522
Part of ISSN: 1935-2735
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 3)‎

Assessment of lymphatic filariasis prior to re-starting mass drug administration campaigns in coastal Kenya.

Parasites & vectors
2017-02-22 | Journal article
DOI: 10.1186/s13071-017-2044-5
PMID: 28228160
PMC: PMC5322668
Source: Self-asserted source
Sammy Njenga

Tetanus Immunity Gaps in Children 5–14 Years and Men ≥ 15 Years of Age Revealed by Integrated Disease Serosurveillance in Kenya, Tanzania, and Mozambique

2017-02-08 | Journal article
DOI: 10.4269/ajtmh.16-0452
Part of ISSN: 0002-9637
Part of ISSN: 1476-1645
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Agricultural chemicals: life changer for mosquito vectors in agricultural landscapes?

Parasit Vectors
2016-12 | Journal article
DOI: 10.1186/s13071-016-1788-7
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Monitoring the impact of a national school based deworming programme on soil-transmitted helminths in Kenya: the first three years, 2012 – 2014

2016-12 | Journal article
DOI: 10.1186/s13071-016-1679-y
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Multi-parallel qPCR provides increased sensitivity and diagnostic breadth for gastrointestinal parasites of humans: field-based inferences on the impact of mass deworming

2016-12 | Journal article
DOI: 10.1186/s13071-016-1314-y
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Soil-Transmitted Helminth Eggs Are Present in Soil at Multiple Locations within Households in Rural Kenya

2016-06-24 | Journal article
DOI: 10.1371/journal.pone.0157780
Part of ISSN: 1932-6203
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Factors influencing community participation in control and related operational research for urogenital schistosomiasis and soil-transmitted helminths in rural villages of Kwale County, coastal Kenya

Pan Afr Med J
2016-06-10 | Journal article
DOI: 10.11604/pamj.2016.24.136.7878
Part of ISSN: 1937-8688
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Understanding the relationship between prevalence of microfilariae and antigenaemia using a model of lymphatic filariasis infection

2016-05 | Journal article
DOI: 10.1093/trstmh/trw024
Part of ISSN: 0035-9203
Part of ISSN: 1878-3503
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

A Cross-Sectional Study of Water, Sanitation, and Hygiene-Related Risk Factors for Soil-Transmitted Helminth Infection in Urban School- and Preschool-Aged Children in Kibera, Nairobi

2016-03-07 | Journal article
DOI: 10.1371/journal.pone.0150744
Part of ISSN: 1932-6203
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Understanding the relationship between prevalence of microfilariae and antigenaemia using a model of lymphatic filariasis infection

2016-02 | Journal article
DOI: 10.1093/trstmh/trv096
Part of ISSN: 0035-9203
Part of ISSN: 1878-3503
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Epidemiology of coinfection with soil transmitted helminths and Plasmodium falciparum among school children in Bumula District in western Kenya

2015 | Journal article
DOI: 10.1186/s13071-015-0891-5
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Associations between school- and household-level water, sanitation and hygiene conditions and soil-transmitted helminth infection among Kenyan school children

2015-12 | Journal article
DOI: 10.1186/s13071-015-1024-x
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Comparing insecticide-treated bed net use to Plasmodium falciparum infection among schoolchildren living near Lake Victoria, Kenya

2015-12 | Journal article
DOI: 10.1186/s12936-015-1031-6
Part of ISSN: 1475-2875
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Current status of Schistosoma mansoni and the factors associated with infection two years following mass drug administration programme among primary school children in Mwea irrigation scheme: A cross-sectional study

2015-12 | Journal article
DOI: 10.1186/s12889-015-1991-z
Part of ISSN: 1471-2458
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Modelling strategies to break transmission of lymphatic filariasis - aggregation, adherence and vector competence greatly alter elimination

2015-12 | Journal article
DOI: 10.1186/s13071-015-1152-3
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎

Modelling the distribution and transmission intensity of lymphatic filariasis in sub-Saharan Africa prior to scaling up interventions: integrated use of geostatistical and mathematical modelling

2015-12 | Journal article
DOI: 10.1186/s13071-015-1166-x
Part of ISSN: 1756-3305
Source: Self-asserted source
Sammy Njenga
grade
Preferred source (of 2)‎
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Page 1 of 2

Peer review (2 reviews for 2 publications/grants)

Review activity for PLoS neglected tropical diseases (1)
Review activity for PloS one. (1)
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