John Ayisi

2.3k total citations
38 papers, 1.8k citations indexed

About

John Ayisi is a scholar working on Pediatrics, Perinatology and Child Health, Public Health, Environmental and Occupational Health and Infectious Diseases. According to data from OpenAlex, John Ayisi has authored 38 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Pediatrics, Perinatology and Child Health, 14 papers in Public Health, Environmental and Occupational Health and 12 papers in Infectious Diseases. Recurrent topics in John Ayisi's work include Global Maternal and Child Health (14 papers), Malaria Research and Control (13 papers) and HIV Research and Treatment (10 papers). John Ayisi is often cited by papers focused on Global Maternal and Child Health (14 papers), Malaria Research and Control (13 papers) and HIV Research and Treatment (10 papers). John Ayisi collaborates with scholars based in Kenya, United States and Netherlands. John Ayisi's 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 and has published in prestigious journals such as PLoS ONE, The Journal of Infectious Diseases and PLoS Medicine.

In The Last Decade

John Ayisi

37 papers receiving 1.7k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
John Ayisi Kenya	25	741	704	416	311	305	38	1.8k
R W Steketee United States	16	511 0.7×	722 1.0×	305 0.7×	130 0.4×	168 0.6×	17	1.3k
Exnevia Gomo Zimbabwe	25	740 1.0×	373 0.5×	441 1.1×	257 0.8×	176 0.6×	83	2.0k
Francine H. Verhoeff United Kingdom	14	395 0.5×	617 0.9×	144 0.3×	310 1.0×	112 0.4×	17	1.2k
Caroline Shulman United Kingdom	22	629 0.8×	1.1k 1.6×	109 0.3×	234 0.8×	82 0.3×	51	2.1k
Victor Mwapasa Malawi	32	692 0.9×	1.3k 1.9×	1.1k 2.7×	146 0.5×	595 2.0×	150	3.2k
Valentino M. Lema Malawi	17	310 0.4×	801 1.1×	315 0.8×	54 0.2×	227 0.7×	41	1.4k
Eyob Tadesse Malawi	16	251 0.3×	817 1.2×	250 0.6×	45 0.1×	234 0.8×	35	1.4k
Robert Leke Cameroon	20	361 0.5×	619 0.9×	149 0.4×	46 0.1×	75 0.2×	50	1.1k
A.M. Greenwood Gambia	22	689 0.9×	1.2k 1.7×	156 0.4×	335 1.1×	18 0.1×	37	2.0k
Lawrence Marum United States	23	399 0.5×	285 0.4×	601 1.4×	149 0.5×	275 0.9×	43	1.2k

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-authorship network of co-authors of John Ayisi

This figure shows the co-authorship network connecting the top 25 collaborators of John Ayisi. A scholar is included among the top collaborators of John Ayisi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with John Ayisi. John Ayisi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Omosun, Yusuf, Anna J. Blackstock, John Williamson, et al.. (2018). Association of maternal KIR gene content polymorphisms with reduction in perinatal transmission of HIV-1. PLoS ONE. 13(1). e0191733–e0191733. 8 indexed citations

Iriemenam, Nnaemeka C., Janardan P. Pandey, John Williamson, et al.. (2013). Association between Immunoglobulin GM and KM Genotypes and Placental Malaria in HIV-1 Negative and Positive Women in Western Kenya. PLoS ONE. 8(1). e53948–e53948. 4 indexed citations

Mwinzi, Pauline N. M., Susan P. Montgomery, Chrispin Owaga, et al.. (2012). Integrated community-directed intervention for schistosomiasis and soil transmitted helminths in western Kenya – a pilot study. Parasites & Vectors. 5(1). 182–182. 46 indexed citations

Iriemenam, Nnaemeka C., Monica P. Shah, Wangeci Gatei, et al.. (2012). Temporal trends of sulphadoxine-pyrimethamine (SP) drug-resistance molecular markers in Plasmodium falciparum parasites from pregnant women in western Kenya. Malaria Journal. 11(1). 134–134. 66 indexed citations

Ouma, Peter, Anna Maria van Eijk, Mary J. Hamel, et al.. (2010). Antenatal and delivery care in rural western Kenya: the effect of training health care workers to provide "focused antenatal care". Reproductive Health. 7(1). 1–1. 119 indexed citations

Eijk, Anna Maria van, John T. Brooks, Penny M. Adcock, et al.. (2009). Diarrhea in children less than two years of age with known HIV status in Kisumu, Kenya. International Journal of Infectious Diseases. 14(3). e220–e225. 37 indexed citations

Eijk, Anna Maria van, Kim A. Lindblade, Frank Odhiambo, et al.. (2009). Geohelminth Infections among Pregnant Women in Rural Western Kenya; a Cross-Sectional Study. PLoS neglected tropical diseases. 3(1). e370–e370. 62 indexed citations

Ned, Renée M., April E. Price, Sara Crawford, et al.. (2008). Effect of Placental Malaria and HIV Infection on the Antibody Responses toPlasmodium falciparumin Infants. The Journal of Infectious Diseases. 198(11). 1609–1619. 16 indexed citations

Eijk, Anna Maria van, Kim A. Lindblade, Frank Odhiambo, et al.. (2008). Reproductive health issues in rural Western Kenya. Reproductive Health. 5(1). 1–1. 26 indexed citations

10.

Eijk, Anna Maria van, Peter Ouma, John Williamson, et al.. (2008). Plasma Folate Level and High‐Dose Folate Supplementation Predict Sulfadoxine‐Pyrimethamine Treatment Failure in Pregnant Women in Western Kenya Who Have Uncomplicated Malaria. The Journal of Infectious Diseases. 198(10). 1550–1553. 19 indexed citations

11.

Green, Michael D., Anna Maria van Eijk, Feiko O. ter Kuile, et al.. (2007). Pharmacokinetics of Sulfadoxine‐Pyrimethamine in HIV‐Infected and Uninfected Pregnant Women in Western Kenya. The Journal of Infectious Diseases. 196(9). 1403–1408. 57 indexed citations

12.

Eijk, Anna Maria van, John Ayisi, Feiko O. ter Kuile, et al.. (2007). HIV, Malaria, and Infant Anemia as Risk Factors for Postneonatal Infant Mortality among HIV‐Seropositive Women in Kisumu, Kenya. The Journal of Infectious Diseases. 196(1). 30–37. 17 indexed citations

13.

Ouma, Peter, Anna Maria van Eijk, Mary J. Hamel, et al.. (2007). Malaria and anaemia among pregnant women at first antenatal clinic visit in Kisumu, western Kenya. Tropical Medicine & International Health. 12(12). 1515–1523. 54 indexed citations

14.

Eijk, Anna Maria van, Frank Odhiambo, John Ayisi, et al.. (2006). Use of antenatal services and delivery care among women in rural western Kenya: a community based survey. Reproductive Health. 3(1). 2–2. 239 indexed citations

15.

Yang, Chunfu, Ming Li, Yaping Shi, et al.. (2004). Genetic Diversity and High Proportion of Intersubtype Recombinants among HIV Type 1-Infected Pregnant Women in Kisumu, Western Kenya. AIDS Research and Human Retroviruses. 20(5). 565–574. 35 indexed citations

16.

Brouwer, Kimberly C., Renu B. Lal, Lisa B. Mirel, et al.. (2004). Polymorphism of Fc receptor IIa for IgG in infants is associated with susceptibility to perinatal HIV-1 infection. AIDS. 18(8). 1187–1194. 52 indexed citations

17.

Eijk, Anna Maria van, John Ayisi, Feiko O. ter Kuile, et al.. (2004). Implementation of intermittent preventive treatment with sulphadoxine–pyrimethamine for control of malaria in pregnancy in Kisumu, western Kenya. Tropical Medicine & International Health. 9(5). 630–637. 53 indexed citations

18.

Ayisi, John, Anna Maria van Eijk, Feiko O. ter Kuile, et al.. (2003). The effect of dual infection with HIV and malaria on pregnancy outcome in western Kenya. AIDS. 17(4). 585–594. 114 indexed citations

19.

Eijk, Anna Maria van, John Ayisi, Feiko O. ter Kuile, et al.. (2002). Risk factors for malaria in pregnancy in an urban and peri-urban population in western Kenya. Transactions of the Royal Society of Tropical Medicine and Hygiene. 96(6). 586–592. 34 indexed citations

20.

Eijk, Anna Maria van, John Ayisi, Feiko O. ter Kuile, et al.. (2002). Malaria and human immunodeficiency virus infection as risk factors for anemia in infants in Kisumu, western Kenya.. American Journal of Tropical Medicine and Hygiene. 67(1). 44–53. 60 indexed citations

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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