Hellen Koka

1.1k total citations
21 papers, 603 citations indexed

About

Hellen Koka is a scholar working on Infectious Diseases, Public Health, Environmental and Occupational Health and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, Hellen Koka has authored 21 papers receiving a total of 603 indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Infectious Diseases, 17 papers in Public Health, Environmental and Occupational Health and 7 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in Hellen Koka's work include Viral Infections and Vectors (19 papers), Mosquito-borne diseases and control (16 papers) and Malaria Research and Control (6 papers). Hellen Koka is often cited by papers focused on Viral Infections and Vectors (19 papers), Mosquito-borne diseases and control (16 papers) and Malaria Research and Control (6 papers). Hellen Koka collaborates with scholars based in Kenya, United States and France. Hellen Koka's co-authors include Rosemary Sang, Joel Lutomiah, Lillian Musila, Albina Makio, David Schnabel, Edith Koskei, Albert Nyunja, Caroline Ochieng, James Mutisya and Fredrick Eyase and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and American Journal of Tropical Medicine and Hygiene.

In The Last Decade

Hellen Koka

19 papers receiving 586 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hellen Koka Kenya 12 507 430 126 86 76 21 603
Edith Chepkorir Kenya 14 449 0.9× 400 0.9× 134 1.1× 70 0.8× 53 0.7× 24 535
Samson Konongoi Kenya 14 487 1.0× 389 0.9× 86 0.7× 38 0.4× 35 0.5× 26 570
James Mutisya Kenya 10 370 0.7× 378 0.9× 78 0.6× 53 0.6× 26 0.3× 19 449
J Thonnon Senegal 9 674 1.3× 626 1.5× 124 1.0× 45 0.5× 107 1.4× 13 813
Diana I. Ortiz United States 14 390 0.8× 477 1.1× 51 0.4× 74 0.9× 33 0.4× 15 618
Giovanni Marini Italy 16 522 1.0× 625 1.5× 49 0.4× 105 1.2× 21 0.3× 41 766
Michaël Luciano Tantely Madagascar 13 289 0.6× 339 0.8× 72 0.6× 44 0.5× 70 0.9× 29 533
Cornelia Svetlana Ceianu Romania 15 754 1.5× 756 1.8× 68 0.5× 87 1.0× 35 0.5× 29 870
Marie‐Marie Olive France 13 372 0.7× 170 0.4× 109 0.9× 48 0.6× 151 2.0× 28 452
Jean-Paul Hervy Senegal 13 394 0.8× 373 0.9× 122 1.0× 149 1.7× 38 0.5× 30 569

Countries citing papers authored by Hellen Koka

Since Specialization
Citations

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

Fields of papers citing papers by Hellen Koka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hellen Koka

This figure shows the co-authorship network connecting the top 25 collaborators of Hellen Koka. A scholar is included among the top collaborators of Hellen Koka 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 Hellen Koka. Hellen Koka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Mulwa, Francis, James Mutisya, Hellen Koka, et al.. (2025). Genetic diversity of Aedes aegypti populations from Kisumu and Busia counties, western Kenya, and their vector competence for chikungunya virus. PLoS ONE. 20(3). e0289191–e0289191.
2.
Mulwa, Francis, Hellen Koka, Samoel Khamadi, et al.. (2024). Isolation and Growth Kinetics of Bogoria Virus from Phlebotomine Sandflies Sampled in Baringo, Kenya. American Journal of Tropical Medicine and Hygiene. 111(2). 412–415.
3.
Koka, Hellen, Francis Mulwa, James Mutisya, et al.. (2024). Combining Morphological and Molecular Tools Can Enhance Tick Species Identification for Improved Tick-Borne Disease Surveillance Among Pastoral Communities in Kenya. Vector-Borne and Zoonotic Diseases. 25(2). 107–117. 1 indexed citations
4.
Koskei, Edith, James Mutisya, Francis Mulwa, et al.. (2024). Isolation and phylogenetic characterization of arboviruses circulating among phlebotomine sandflies in parts of North Rift, Kenya. SHILAP Revista de lepidopterología. 4. 6 indexed citations
5.
Koka, Hellen, Samuel O. Oyola, James Mutisya, et al.. (2024). Detection and prevalence of a novel Bandavirus related to Guertu virus in Amblyomma gemma ticks and human populations in Isiolo County, Kenya. PLoS ONE. 19(9). e0310862–e0310862. 1 indexed citations
6.
Mulwa, Francis, Hellen Koka, Samoel Khamadi, et al.. (2024). Characterization of West Nile virus Koutango lineage from phlebotomine sandflies in Kenya. PLoS ONE. 19(8). e0301956–e0301956. 1 indexed citations
7.
Koka, Hellen, Joel Lutomiah, Edith Koskei, et al.. (2021). Evidence of circulation of Orthobunyaviruses in diverse mosquito species in Kwale County, Kenya. Virology Journal. 18(1). 204–204. 1 indexed citations
8.
Lutomiah, Joel, Francis Mulwa, James Mutisya, et al.. (2021). Probable contribution of Culex quinquefasciatus mosquitoes to the circulation of chikungunya virus during an outbreak in Mombasa County, Kenya, 2017–2018. Parasites & Vectors. 14(1). 138–138. 8 indexed citations
9.
Eyase, Fredrick, Irina Maljkovic Berry, Francis Mulwa, et al.. (2020). Emergence of a novel chikungunya virus strain bearing the E1:V80A substitution, out of the Mombasa, Kenya 2017-2018 outbreak. PLoS ONE. 15(11). e0241754–e0241754. 13 indexed citations
10.
Konongoi, Samson, Albert Nyunja, Victor Ofula, et al.. (2018). Human and entomologic investigations of chikungunya outbreak in Mandera, Northeastern Kenya, 2016. PLoS ONE. 13(10). e0205058–e0205058. 29 indexed citations
11.
Koka, Hellen, et al.. (2018). Coxiella burnetiiDetected in Tick Samples from Pastoral Communities in Kenya. BioMed Research International. 2018. 1–5. 26 indexed citations
12.
Koka, Hellen, et al.. (2017). The Detection of Spotted Fever Group Rickettsia DNA in Tick Samples From Pastoral Communities in Kenya. Journal of Medical Entomology. 54(3). tjw238–tjw238. 24 indexed citations
13.
Sang, Rosemary, Joel Lutomiah, Mohammed Y. Said, et al.. (2016). Effects of Irrigation and Rainfall on the Population Dynamics of Rift Valley Fever and Other Arbovirus Mosquito Vectors in the Epidemic-Prone Tana River County, Kenya. Journal of Medical Entomology. 54(2). tjw206–tjw206. 29 indexed citations
14.
Konongoi, Samson, Victor Ofula, Albert Nyunja, et al.. (2016). Detection of dengue virus serotypes 1, 2 and 3 in selected regions of Kenya: 2011–2014. Virology Journal. 13(1). 182–182. 53 indexed citations
15.
Lutomiah, Joel, Roberto Barrera, Albina Makio, et al.. (2016). Dengue Outbreak in Mombasa City, Kenya, 2013–2014: Entomologic Investigations. PLoS neglected tropical diseases. 10(10). e0004981–e0004981. 64 indexed citations
16.
Lutomiah, Joel, Lillian Musila, Albina Makio, et al.. (2014). Ticks and Tick-Borne Viruses From Livestock Hosts in Arid and Semiarid Regions of the Eastern and Northeastern Parts of Kenya. Journal of Medical Entomology. 51(1). 269–277. 28 indexed citations
17.
Ochieng, Caroline, Joel Lutomiah, Albina Makio, et al.. (2013). Mosquito-borne arbovirus surveillance at selected sites in diverse ecological zones of Kenya; 2007 – 2012. Virology Journal. 10(1). 140–140. 82 indexed citations
18.
Lutomiah, Joel, Hellen Koka, James Mutisya, et al.. (2011). Ability of Selected Kenyan Mosquito (Diptera: Culicidae) Species to Transmit West Nile Virus Under Laboratory Conditions. Journal of Medical Entomology. 48(6). 1197–1201. 28 indexed citations
19.
Sang, Rosemary, Hanafi Hanafi, Robert F. Breiman, et al.. (2010). Rift Valley Fever Virus Epidemic in Kenya, 2006/2007: The Entomologic Investigations. American Journal of Tropical Medicine and Hygiene. 83(2_Suppl). 28–37. 157 indexed citations
20.
Ngumbi, Philip M., et al.. (2010). Comparative performance of light trap types, lunar influence and sandfly abundance in Baringo district, Kenya.. PubMed. 47(2). 108–12. 9 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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