Evidence map›Paper›PMID 25928743›Full record

ArticleParasites & vectors2015

Parasites and vectors of malaria on Rusinga Island, Western Kenya.

Evelyn A Olanga, Lawrence Okombo, Lucy W Irungu, Wolfgang R Mukabana

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Article in Parasites & vectors, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

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21citing papers in PubMed
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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

Who cites it

21 citing papers in PubMed.

  1. Trial
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  3. Review
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  9. Prevalence of asymptomaticWellcome open research · 2020
    Article
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  11. Review
  12. Observational
  13. Article
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  15. Article
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  18. Geographic-genetic analysis ofWellcome open research · 2017
    Article
  19. Article
  20. Article
4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Evelyn A OlangaInternational Centre of Insect Physiology and Ecology, P.O. Box 30772 GPO, Nairobi, Kenya. eveolanga@gmail.com.
Lawrence OkomboInternational Centre of Insect Physiology and Ecology, P.O. Box 30772 GPO, Nairobi, Kenya. lawrence.okombo@gmail.com.
Lucy W IrunguSchool of Biological Sciences, University of Nairobi, P.O. Box 30197 GPO, Nairobi, Kenya. lirungu@uonbi.ac.ke.
Wolfgang R MukabanaInternational Centre of Insect Physiology and Ecology, P.O. Box 30772 GPO, Nairobi, Kenya. rmukabana@yahoo.co.uk.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThere is a dearth of information on malaria endemicity in the islands of Lake Victoria in western Kenya. In this study malaria prevalence and Plasmodium sporozoite rates on Rusinga Island were investigated. The contribution of different Anopheles species to indoor and outdoor transmission of malaria was also determined.

methodsActive case detection through microscopy was used to diagnose malaria in a 10% random sample of the human population on Rusinga Island and a longitudinal entomological survey conducted in Gunda village in 2012. Nocturnally active host-seeking mosquitoes were captured indoors and outdoors using odour-baited traps. Anopheles species were tested for the presence of Plasmodium parasites using an enzyme linked immunosorbent assay. All data were analyzed using generalized linear models.

resultsSingle infections of Plasmodium falciparum (88.1%), P. malariae (3.96%) and P. ovale (0.79%) as well as multiple infections (7.14%) of these parasites were found on Rusinga Island. The overall malaria prevalence was 10.9%. The risk of contracting malaria was higher among dwellers of Rusinga West than Rusinga East locations (Odds Ratio [OR] = 1.5, 95% Confidence Interval [CI] 1.14 - 1.97, P = 0.003). Parasite positivity was significantly associated with individuals who did not use malaria protective measures (OR = 2.65, 95% CI 1.76 - 3.91, p < 0.001). A total of 1,684 mosquitoes, including 74 anophelines, were captured. Unlike Culex species, more of which were collected indoors than outdoors (P < 0.001), the females of An. gambiae s.l. (P = 0.477), An. funestus s.l. (P = 0.153) and Mansonia species captured indoors versus outdoors were not different. The 46 An. gambiae s.l. collected were mainly An. arabiensis (92.3%). Of the 62 malaria mosquitoes tested, 4, including 2 indoor and 2 outdoor-collected individuals had Plasmodium.

conclusionThe rather significant and unexpected contribution of P. malariae and P. ovale to the overall malaria prevalence on Rusinga Island underscores the epidemiological importance of these species in the big push towards eliminating malaria. Although current entomological interventions mainly target indoor environments, additional strategies should be considered to prevent outdoor transmission of malaria.

Indexed as

AdolescentAdultAnimalsAnophelesChildChild, PreschoolFemaleHumansInfantInsecticide-Treated BednetsInsect VectorsIslandsKenyaMalariaMaleMiddle Aged

Identifiers

PMID25928743
PMCPMC4422414

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.