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Cited by 13Malaria Research and ControlMosquito-borne diseases and controlBird parasitology and diseases

Malaria vector bionomics and transmission in irrigated and non-irrigated sites in western Kenya

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Ondeto, Benyl M., Wang, Xiaoming, Atieli, Harrysone, Orondo, Pauline Winnie, Ochwedo, Kevin O., Omondi, Collince J., Otambo, Wilfred O., Zhong, Daibin +8 more·2022·Parasitology Research
DOI 10.1007/s00436-022-07678-2PMC PMC9653358
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Abstract

Irrigation not only helps to improve food security but also creates numerous water bodies for mosquito production. This study assessed the effect of irrigation on malaria vector bionomics and transmission in a semi-arid site with ongoing malaria vector control program. The effectiveness of CDC light traps in the surveillance of malaria vectors was also evaluated relative to the human landing catches (HLCs) method. Adult mosquitoes were sampled in two study sites representing irrigated and non-irrigated agroecosystems in western Kenya using a variety of trapping methods. The mosquito samples were identified to species and assayed for host blood meal source and Plasmodium spp. sporozoite infection using polymerase chain reaction. Anopheles arabiensis was the dominant malaria vector in the two study sites and occurred in significantly higher densities in irrigated study site compared to the non-irrigated study site. The difference in indoor resting density of An . arabiensis during the dry and wet seasons was not significant. Other species, including An . funestus , An . coustani , and An . pharoensis , were collected. The An . funestus indoor resting density was 0.23 in irrigated study site while almost none of this species was collected in the non-irrigated study site. The human blood index (HBI) for An . arabiensis in the irrigated study site was 3.44% and significantly higher than 0.00% for the non-irrigated study site. In the irrigated study site, the HBI of An . arabiensi s was 3.90% and 5.20% indoor and outdoor, respectively. The HBI of An . funestus was 49.43% and significantly higher compared to 3.44% for An . arabiensis in the irrigated study site. The annual entomologic inoculation rate for An . arabiensis in the irrigated study site was 0.41 and 0.30 infective bites/person/year indoor and outdoor, respectively, whereas no transmission was observed in the non-irrigated study site. The CDC light trap performed consistently with HLC in terms of vector density. These findings demonstrate that irrigated agriculture may increase the risk of malaria transmission in irrigated areas compared to the non-irrigated areas and highlight the need to complement the existing malaria vector interventions with novel tools targeting the larvae and both indoor and outdoor biting vector populations. Graphical abstract

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Cited by

Sorted by citations

Authors
Ondeto, B. M., Wang, X., Atieli, H., Orondo, P. W., Ochwedo, K. O., Omondi, C. J., Otambo, W. O., Zhong, D., Zhou, G., Lee, M.-C., Muriu, S. M., Odongo, D. O., Ochanda, H., Kazura, J., Githeko, A. K., & Yan, G.
Affiliations
  • University of Nairobi (KE)
  • University of California, Irvine (US)
  • Tom Mboya University College (KE)
  • Jomo Kenyatta University of Agriculture and Technology (KE)
  • Maseno University (KE)
  • Pwani University (KE)
  • Case Western Reserve University (US)
  • Kenya Medical Research Institute (KE)
Corresponding author
  • Ondeto, Benyl M.
  • Yan, Guiyun
ORCID
Venue
Parasitology Research
Publisher
Springer Science and Business Media LLC
Published
2022-10-07
Volume
121
Issue
12
Pages
3529-3545
ISSN
  • 0044-3255 (ISSN-L)
  • 0932-0113
  • 1432-1955
DOI
10.1007/s00436-022-07678-2
PMC
PMC9653358
OpenAlex
W4302774298
Cited by
13
References
2
Citations by year
2026: 4 · 2025: 2 · 2024: 1 · 2023: 6
FWCI
2.21
Type
journal article
Language
en
Open access
Licence
Locations
  • Parasitology Research (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • Greater South Information System
Funders
  • National Institutes of Health (U19AI129326 and D43TW001505, AI129326)
  • National Institute of Allergy and Infectious Diseases (U19AI129326)
  • Fogarty International Center (D43TW001505)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Malaria Research and Control
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Mosquito-borne diseases and control
  • Life Sciences › Immunology and Microbiology › Parasitology › Bird parasitology and diseases
Keywords
malaria vectors, irrigation, Anopheles arabiensis, Anopheles funestus, Anopheles coustani, Anopheles pharoensis, human blood index, CDC light traps, human landing catches, malaria transmission, irrigated agriculture, Western Kenya
MeSH terms
Mosquito Vectors, Adult, Animals, Anopheles, Ecology, Humans, Kenya, Malaria, Mosquito Control

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