John H. Ouma

12.7k citations

203 papers · 10.5k indexed · h-index 61

Impact in

Parasitology top 0.01%
- Parasites and Host Interactions
Small Animals top 0.1%
- Helminth infection and control

Papers in

Parasitology 160
- Parasites and Host Interactions 157
Pediatrics, Perinatology and Child Health 57
- Global Maternal and Child Health 55

Co-authors: A Butterworth David W. Dunne Anthony J. C. Fulford R. F. Sturrock Eric M. Muchiri Peter Mungai Charles H. King Christopher L. King
Journals: American Journal of Tropical Medicine and Hygiene (31 papers)Transactions of the Royal Society of Tropical Medicine and Hygiene (26 papers)The Journal of Infectious Diseases (13 papers)The Journal of Immunology (11 papers)Parasitology (11 papers)
Partner nations: Kenya United Kingdom United States

In The Last Decade

John H. Ouma

201 papers receiving 10.1k citations

Peers

Countries citing papers authored by John H. Ouma

Since Specialization

Citations

This map shows the geographic impact of John H. Ouma's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by John H. Ouma with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John H. Ouma more than expected).

Fields of papers citing papers by John H. Ouma

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John H. Ouma. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by John H. Ouma. The network helps show where John H. Ouma may publish in the future.

Co-authors

The 25 scholars most cited alongside John H. Ouma, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with John H. Ouma Line = papers co-authored together John H. Ouma links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Effect of tillage method and sowing time on phenology, yield and yield components of chickpea (Cicer arietinum L.) under semi-arid conditions in Kenya Journal of Applied Biosciences ·김석규, John H. Ouma, A.M. Kibe	2010	3
2	Health implications of chronic hepatosplenomegaly in Kenyan school-aged children chronically exposed to malarial infections and Schistosoma mansoni Transactions of the Royal Society of Tropical Medicine and Hygiene ·Shona Wilson, Birgitte J. Vennervald, Hilda Kadzo, Edmund Ireri, Т. А. Куняева, Mark Booth, H. Curtis Kariuki, Joseph K. Mwatha, Gachuhi Kimani, John H. Ouma, Eric M. Muchiri, David W. Dunne	2009	19
3	Transmission studies of intestinal schistosomiasis in Lake Albert, Uganda and experimental compatibility of local Biomphalaria spp. Parasitology International ·Francis Kazibwe, Boris Makanga, C. Rubaire-Akiiki, John H. Ouma, Curtis Kariuki, Narcis B. Kabatereine, Birgitte J. Vennervald, David Rollinson, J. Russell Stothard	2009	25
4	Age-adjusted Plasmodium falciparum antibody levels in school-aged children are a stable marker of microgeographical variations in exposure to Plasmodiuminfection BMC Infectious Diseases ·Shona Wilson, Mark Booth, Frances M. Jones, Joseph K. Mwatha, Gachuhi Kimani, H. Curtis Kariuki, Birgitte J. Vennervald, John H. Ouma, Eric M. Muchiri, David W. Dunne	2007	33
5	Carriage of DRB113* Is Associated with Increased Posttreatment IgE Levels against Schistosoma mansoni Antigens and Lower Long-Term Reinfection Levels The Journal of Immunology ·Mark Booth, Marie Shaw, Danielle Carpenter, Sarah Joseph, Narcis B. Kabatereine, Florina-Corina Patcas, Joseph K. Mwatha, Frances M. Jones, 辻村卓也, John H. Ouma, David W. Dunne	2006	11
6	Increased Human IgE Induced by Killing Schistosoma mansoni In Vivo Is Associated with Pretreatment Th2 Cytokine Responsiveness to Worm Antigens The Journal of Immunology ·Klaudia Walter, Anthony J. C. Fulford, Rowena McBeath, Sarah Joseph, Frances M. Jones, H.C. Kariuki, Joseph K. Mwatha, Gachuhi Kimani, Narcis B. Kabatereine, Birgitte J. Vennervald, John H. Ouma, David W. Dunne	2006	42
7	Periportal Fibrosis in Human Schistosoma mansoni Infection Is Associated with Low IL-10, Low IFN-γ, High TNF-α, or Low RANTES, Depending on Age and Gender The Journal of Immunology ·Mark Booth, Joseph K. Mwatha, Sarah Joseph, Frances M. Jones, Hilda Kadzo, Edmund Ireri, Alessandro Della Latta, Jovanice Kemijumbi, Curtis Kariuki, Gachuhi Kimani, John H. Ouma, Narcis B. Kabatereine, Birgitte J. Vennervald, David W. Dunne	2004	152
8	Detailed clinical and ultrasound examination of children and adolescents in a Schistosoma mansoni endemic area in Kenya: hepatosplenic disease in the absence of portal fibrosis Tropical Medicine & International Health ·Birgitte J. Vennervald, 宏明竹山, A Butterworth, Curtis Kariuki, Hilda Kadzo, Edmund Ireri, Т. А. Куняева, Gachuhi Kimani, Joseph K. Mwatha, Payson Wild, Mark Booth, John H. Ouma, David W. Dunne	2004	57
9	IL-13 receptor α 2 down-modulates granulomatous inflammation and prolongs host survival in schistosomiasis Proceedings of the National Academy of Sciences ·Margaret Mentink‐Kane, Allen W. Cheever, Robert W. Thompson, Danielle M. Hari, Narcis B. Kabatereine, Birgitte J. Vennervald, John H. Ouma, Joseph K. Mwatha, Frances M. Jones, Debra D. Donaldson, Michael J. Grusby, David W. Dunne, Thomas A. Wynn	2003	118
10	Acquired Immune Responses to Plasmodium falciparum Merozoite Surface Protein-1 in the Human Fetus The Journal of Immunology ·Christopher L. King, Indu Malhotra, Alex Wamachi, John Kioko, Peter Mungai, Anh D Le, Davy Koech, Peter A. Zimmerman, John H. Ouma, James W. Kazura	2002	93
11	Molecular evolution of freshwater snail intermediate hosts within the Bulinus forskalii group Parasitology ·Catherine S. Jones, David Rollinson, Rémy Mimpfoundi, John H. Ouma, H.C. Kariuki, Leslie R. Noble	2001	28
12	Situation Analysis of Malaria in School-aged Children in Kenya – What Can Be Done? Parasitology Today ·S Brooker, Helen Guyatt, Judy Omumbo, Rima Shretta, Lesley Drake, John H. Ouma	2000	67
13	Distribution of Schistosoma haematobium Infection in Kwale District of Coast Province, Kenya Nagasaki University's Academic Output SITE (Nagasaki University) ·John H. Ouma, Shtift Ak, Темирбеков Жээнбек Темирбекович, Masaaki Shimada, Yoshiki Aoki	1998	0
14	Effectiveness of chloroquine and sulfadoxine/pyrimethamine combination in the treatment of falciparum malaria in a malaria endemic area of Kenya East African Medical Journal ·Pascal Magnussen, Benson Estambale, John H. Ouma, J Kiambo Njagi, E. W. Kabiru, Beth Rapuoda	1998	1
15	A school‐based approach to the control of urinary schistosomiasis and intestinal helminth infections in children in Matuga, Kenya: impact of a two‐year chemotherapy programme on prevalence and intensity of infections Tropical Medicine & International Health ·Pascal Magnussen, Eric M. Muchiri, Peter Mungai, 佐々木隆博, John H. Ouma, 好規岩崎	1997	43
16	A malariometric survey in Turkana District, Kenya: chemosensitivity in vivo of Plasmodium falciparum infections and identity of the vector Transactions of the Royal Society of Tropical Medicine and Hygiene ·David C. Clarke, Jonas Olovsson, John H. Ouma, Reino Toop, López Trejos, Beth Rapuoda, W.M. Watkins	1996	12
17	Water contact observations in Kenyan communities endemic for schistosomiasis: methodology and patterns of behaviour Parasitology ·Anthony J. C. Fulford, John H. Ouma, H.C. Kariuki, Темирбеков Жээнбек Темирбекович, Subhamoy Singha Roy, Helmut Kloos, R. F. Sturrock, A Butterworth	1996	50
18	Morbidity markers for Schistosoma haematobium infection. PubMed ·Birgitte J. Vennervald, Claus M. Reimert, John H. Ouma, W. L. Kilama, A. M. Deelder, Christoph Hatz	1994	1
19	Seroepidemiology and serodiagnosis of schistosomiasis in Kenya using crude and purified egg antigens of Schistosoma mansoni in ELISA Transactions of the Royal Society of Tropical Medicine and Hygiene ·Michael J. Doenhoff, A Butterworth, Richard Hayes, R. F. Sturrock, John H. Ouma, D. Koech, M. A. Prentice, Alvaro Martins	1993	60
20	Longitudinal studies on human schistosomiasis Philosophical transactions of the Royal Society of London. Series B, Biological sciences ·A Butterworth, Anthony J. C. Fulford, David W. Dunne, John H. Ouma, R. F. Sturrock	1988	67

About John H. Ouma

John H. Ouma is a scholar working on Parasitology, Pediatrics, Perinatology and Child Health, Ecology, Small Animals and Public Health, Environmental and Occupational Health, having authored 203 papers that have together received 10.5k indexed citations. Recurring topics across this work include Parasites and Host Interactions (157 papers), Parasite Biology and Host Interactions (72 papers), Global Maternal and Child Health (55 papers), Research on Leishmaniasis Studies (34 papers), Malaria Research and Control (34 papers), Child Nutrition and Water Access (21 papers), Helminth infection and control (19 papers) and Mosquito-borne diseases and control (17 papers). The work is most often cited by research in Parasitology (7.3k citations), Small Animals (1.4k citations), Ecology (3.6k citations), Public Health, Environmental and Occupational Health (3.7k citations) and Pediatrics, Perinatology and Child Health (2.4k citations). John H. Ouma has collaborated with scholars based in Kenya, United Kingdom and United States. Frequent co-authors include A Butterworth, David W. Dunne, Anthony J. C. Fulford, R. F. Sturrock, Eric M. Muchiri, Peter Mungai, Charles H. King, Christopher L. King, Birgitte J. Vennervald and T.K.Arap Siongok. Their work appears in journals such as American Journal of Tropical Medicine and Hygiene, Transactions of the Royal Society of Tropical Medicine and Hygiene, The Journal of Infectious Diseases, The Journal of Immunology and Parasitology.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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