John Ayisi

2.3k citations

38 papers · 1.8k indexed · h-index 25

Impact in

Virology top 2%
- HIV Research and Treatment
Pediatrics, Perinatology and Child Health top 1%
- Global Maternal and Child Health

Papers in ⓘ

Pediatrics, Perinatology and Child Health 16
- Global Maternal and Child Health 14
Public Health, Environmental and Occupational Health 14
- Malaria Research and Control 13

Co-authors: Anna Maria van Eijk (30 shared papers)Bernard L. Nahlen (25 shared papers)Richard W. Steketee (21 shared papers)Laurence Slutsker (17 shared papers)Piet A. Kager (13 shared papers)Feiko O. ter Kuile (16 shared papers)Ambrose Misore (12 shared papers)Daniel H. Rosen (9 shared papers)
Journals: The Journal of Infectious Diseases (6 papers)AIDS (4 papers)Tropical Medicine & International Health (4 papers)PLoS ONE (4 papers)Reproductive Health (3 papers)
Partner nations: Kenya United States Netherlands

In The Last Decade

John Ayisi

37 papers receiving 1.7k citations

Peers

Countries citing papers authored by John Ayisi

Since Specialization

Citations

This map shows the geographic impact of John Ayisi'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 Ayisi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John Ayisi more than expected).

Fields of papers citing papers by John Ayisi

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John Ayisi. 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 Ayisi. The network helps show where John Ayisi may publish in the future.

Co-authors

The 25 scholars most cited alongside John Ayisi, 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 Ayisi Line = papers co-authored together John Ayisi links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 38 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Use of antenatal services and delivery care among women in rural western Kenya: a community based survey Reproductive Health ·Anna Maria van Eijk, Hanneke M Bles, Frank Odhiambo, John Ayisi, Ilse E Blokland, Daniel H. Rosen, Kubaje Adazu, Laurence Slutsker, Kim A. Lindblade	2006	239
2	Antenatal and delivery care in rural western Kenya: the effect of training health care workers to provide "focused antenatal care" Reproductive Health ·Peter Ouma, Anna Maria van Eijk, Mary J. Hamel, Evallyne Sikuku, Frank Odhiambo, Kaendi Munguti, John Ayisi, Sara Crawford, Piet A. Kager, Laurence Slutsker	2010	119
3	The effect of dual infection with HIV and malaria on pregnancy outcome in western Kenya AIDS ·John Ayisi, Anna Maria van Eijk, Feiko O. ter Kuile, MARGARETTE S. KOLCZAK, Juliana A. Otieno, Ambrose Misore, Piet A. Kager, Richard W. Steketee, Bernard L. Nahlen	2003	114
4	HIV increases the risk of malaria in women of all gravidities in Kisumu, Kenya AIDS ·Anna Maria van Eijk, John Ayisi, Feiko O. ter Kuile, Ambrose Misore, Juliana A. Otieno, Daniel H. Rosen, Piet A. Kager, Richard W. Steketee, Bernard L. Nahlen	2003	100
5	Maternal Malaria and Perinatal HIV Transmission, Western Kenya1^,2 Emerging infectious diseases ·John Ayisi, Anna Maria van Eijk, Robert D. Newman, Feiko O. ter Kuile, Ya Ping Shi, Chunfu Yang, MARGARETTE S. KOLCZAK, Juliana A. Otieno, Ambrose Misore, Piet A. Kager, Renu B. Lal, Richard W. Steketee, Bernard L. Nahlen	2004	79
6	HIV Impairs Opsonic Phagocytic Clearance of Pregnancy-Associated Malaria Parasites PLoS Medicine ·Jessica Keen, Lena Serghides, Kodjo Ayi, Samir N. Patel, John Ayisi, Anne van Eijk, Richard W. Steketee, Venkatachalam Udhayakumar, Kevin C. Kain	2007	75
7	Temporal trends of sulphadoxine-pyrimethamine (SP) drug-resistance molecular markers in Plasmodium falciparum parasites from pregnant women in western Kenya Malaria Journal ·Nnaemeka C. Iriemenam, Monica P. Shah, Wangeci Gatei, Anna Maria van Eijk, John Ayisi, Simon Kariuki, Jodi Vanden Eng, Simon O. Owino, Ashima A Lal, Yusuf Omosun, Kephas Otieno, Meghna Desai, Feiko O. ter Kuile, Bernard L. Nahlen, Julie M. Moore, Mary J. Hamel, Peter Ouma, Laurence Slutsker, Ya Ping Shi	2012	66
8	Geohelminth Infections among Pregnant Women in Rural Western Kenya; a Cross-Sectional Study PLoS neglected tropical diseases ·Anna Maria van Eijk, Kim A. Lindblade, Frank Odhiambo, Elizabeth Peterson, Daniel H. Rosen, Diana M. S. Karanja, John Ayisi, Ya Ping Shi, Kubaje Adazu, Laurence Slutsker	2009	62
9	Malaria and human immunodeficiency virus infection as risk factors for anemia in infants in Kisumu, western Kenya. American Journal of Tropical Medicine and Hygiene ·Anna Maria van Eijk, John Ayisi, Feiko O. ter Kuile, Ambrose Misore, Juliana A. Otieno, MARGARETTE S. KOLCZAK, Piet A. Kager, Richard W. Steketee, Bernard L. Nahlen	2002	60
10	Pharmacokinetics of Sulfadoxine‐Pyrimethamine in HIV‐Infected and Uninfected Pregnant Women in Western Kenya The Journal of Infectious Diseases ·Michael D. Green, Anna Maria van Eijk, Feiko O. ter Kuile, John Ayisi, Monica E. Parise, Piet A. Kager, Bernard L. Nahlen, Richard W. Steketee, Henry Nettey	2007	57
11	Care seeking and attitudes towards treatment compliance by newly enrolled tuberculosis patients in the district treatment programme in rural western Kenya: a qualitative study BMC Public Health ·John Ayisi, Anna H. van’t Hoog, Janet Agaya, Walter Mchembere, Peter Nyamthimba, Odylia Muhenje, Barbara J. Marston	2011	57
12	Malaria and anaemia among pregnant women at first antenatal clinic visit in Kisumu, western Kenya Tropical Medicine & International Health ·Peter Ouma, Anna Maria van Eijk, Mary J. Hamel, Monica E. Parise, John Ayisi, Kephas Otieno, Piet A. Kager, Laurence Slutsker	2007	54
13	Implementation of intermittent preventive treatment with sulphadoxine–pyrimethamine for control of malaria in pregnancy in Kisumu, western Kenya Tropical Medicine & International Health ·Anna Maria van Eijk, John Ayisi, Feiko O. ter Kuile, Laurence Slutsker, Juliana A. Otieno, Ambrose Misore, Judith Odondi, Daniel H. Rosen, Piet A. Kager, Rick Steketee, Bernard L. Nahlen	2004	53
14	Immunity to Placental Malaria. II. Placental Antigen–Specific Cytokine Responses Are Impaired in Human Immunodeficiency Virus–Infected Women The Journal of Infectious Diseases ·Julie M. Moore, John Ayisi, Bernard L. Nahlen, Ambrose Misore, Altaf A. Lal, Venkatachalam Udhayakumar	2000	53
15	Polymorphism of Fc receptor IIa for IgG in infants is associated with susceptibility to perinatal HIV-1 infection AIDS ·Kimberly C. Brouwer, Renu B. Lal, Lisa B. Mirel, Chunfu Yang, Anna Maria van Eijk, John Ayisi, Juliana Otieno, Bernard L. Nahlen, Richard W. Steketee, Altaf A. Lal, Ya Ping Shi	2004	52
16	Risk factors for HIV infection among asymptomatic pregnant women attending an antenatal clinic in western Kenya International Journal of STD & AIDS ·John Ayisi, Anna Maria van Eijk, Feiko O. ter Kuile, MARGARETTE S. KOLCZAK, Juliana A. Otieno, Ambrose Misore	2000	51
17	Integrated community-directed intervention for schistosomiasis and soil transmitted helminths in western Kenya – a pilot study Parasites & Vectors ·Pauline N. M. Mwinzi, Susan P. Montgomery, Chrispin Owaga, Mariam T. Mwanje, Erick M. O. Muok, John Ayisi, Kayla F. Laserson, Erick M Muchiri, W. Evan Secor, Diana M. S. Karanja	2012	46
18	Genetic diversity of HIV-1 in western Kenya: subtype-specific differences in mother-to-child transmission. PubMed ·Chunfu Yang, Ming Li, Robert D. Newman, Yaping Shi, John Ayisi, Anna Maria van Eijk, Juliana A. Otieno, Ambrose Misore, Richard W. Steketee, Bernard L. Nahlen, Renu B. Lal	2003	45
19	Genetic diversity of HIV-1 in western Kenya AIDS ·Chunfu Yang, Ming Li, Robert D. Newman, Yaping Shi, John Ayisi, Anna Maria van Eijk, Juliana A. Otieno, Ambrose Misore, Richard W. Steketee, Bernard L. Nahlen, Renu B. Lal	2003	40
20	Diarrhea in children less than two years of age with known HIV status in Kisumu, Kenya International Journal of Infectious Diseases ·Anna Maria van Eijk, John T. Brooks, Penny M. Adcock, Valerie Garrett, Mark Eberhard, Daniel H. Rosen, John Ayisi, John B. Ochieng, Lata Kumar, Jon R. Gentsch, Bernard L. Nahlen, Eric D. Mintz, Laurence Slutsker	2009	37

About John Ayisi

John Ayisi is a scholar working on Pediatrics, Perinatology and Child Health, Public Health, Environmental and Occupational Health, Infectious Diseases, Virology and Immunology, having authored 38 papers that have together received 1.8k indexed citations. Recurring topics across this work include Global Maternal and Child Health (14 papers), Malaria Research and Control (13 papers), HIV Research and Treatment (10 papers), HIV/AIDS Research and Interventions (8 papers), Complement system in diseases (8 papers), Child Nutrition and Water Access (6 papers), HIV/AIDS drug development and treatment (5 papers) and Reproductive System and Pregnancy (4 papers). The work is most often cited by research in Virology (305 citations), Pediatrics, Perinatology and Child Health (741 citations), Parasitology (245 citations), Public Health, Environmental and Occupational Health (704 citations) and Infectious Diseases (416 citations). John Ayisi has collaborated with scholars based in Kenya, United States and Netherlands. Frequent co-authors include Anna Maria van Eijk, Bernard L. Nahlen, Richard W. Steketee, Laurence Slutsker, Piet A. Kager, Feiko O. ter Kuile, Ambrose Misore, Daniel H. Rosen, Frank Odhiambo and Juliana A. Otieno. Their work appears in journals such as The Journal of Infectious Diseases, AIDS, Tropical Medicine & International Health, PLoS ONE and Reproductive Health.

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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