Characteristics of Aedes aegypti adult mosquitoes in rural and urban areas of western and coastal Kenya

dc.contributor.authorNdenga, Bryson Alberto
dc.contributor.authorMutuku, Francis Maluki
dc.contributor.authorNgugi, Harun Njenga
dc.contributor.authorOmari, Mbakaya Joel
dc.contributor.authorAswani, Peter
dc.contributor.authorMusunzaji, Peter Siema
dc.contributor.authorVulule, John
dc.contributor.authorMukoko, Dunstan
dc.contributor.authorKitron, Uriel
dc.contributor.authorLaBeaud,Angelle Desiree
dc.date.accessioned2025-02-24T06:33:09Z
dc.date.available2025-02-24T06:33:09Z
dc.date.issued2017-12-19
dc.descriptionhngugi@chuka.ac.ke
dc.description.abstractAedes aegypti is the main vector for yellow fever, dengue, chikungunya and Zika viruses.Recent outbreaks of dengue and chikungunya have been reported in Kenya. Presence and abundance of this vector is associated with the risk for the occurrence and transmission of these diseases. This study aimed to characterize the presence and abundance of Ae. aegypti adult mosquitoes from rural and urban sites in western and coastal regions of Kenya. Presence and abundance of Ae. aegypti adult mosquitoes were determined indoors and outdoors in two western (urban Kisumu and rural Chulaimbo) and two coastal (urban Ukunda and rural Msambweni) sites in Kenya. Sampling was performed using quarterly human landing catches, monthly Prokopack automated aspirators and monthly Biogents-sentinel traps. A total of 2,229 adult Ae. aegypti mosquitoes were collected: 785 (35.2%) by human landing catches, 459 (20.6%) by Prokopack aspiration and 985 (44.2%) by Biogents-sentinel traps. About three times as many Ae. aegypti mosquitoes were collected in urban than rural sites (1,650 versus 579). Comparable numbers were collected in western (1,196) and coastal (1,033) sites. Over 80% were collected outdoors through human landing catches and Prokopack aspiration. The probability of collecting Ae. aegypti mosquitoes by human landing catches was significantly higher in the afternoon than morning hours (P<0.001), outdoors than indoors (P<0.001) and in urban than rural sites (P = 0.008). Significantly more Ae. aegypti mosquitoes were collected using Prokopack aspiration outdoors than indoors (P<0.001) and in urban than rural areas (P<0.001). Significantly more mosquitoes were collected using Biogents-sentinel traps in urban than rural areas (P = 0.008) and in western than coastal sites (P = 0.006). The probability of exposure to Ae. aegypti bites was highest in urban areas, outdoors and in the afternoon hours. These characteristics have major implications for the possible transmission of arboviral diseases and for the planning of surveillance and control programs.
dc.description.sponsorshipThis study was funded by a program award RO1 AI102918 from the National Institutes of Health, USA to Dr.Angelle Desiree LaBeaud. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
dc.identifier.citationNdenga BA, Mutuku FM, Ngugi HN, Mbakaya JO, Aswani P, Musunzaji PS, et al. (2017) Characteristics of Aedes aegypti adult mosquitoes in rural and urban areas of western and coastal Kenya. PLoS ONE 12(12): e0189971. https://doi. org/10.1371/journal.pone.0189971
dc.identifier.otherhttps://doi. org/10.1371/journal.pone.0189971
dc.identifier.urihttps://repository.chuka.ac.ke/handle/123456789/16510
dc.language.isoen
dc.publisherPLOS ONE
dc.subjectAedes aegypti
dc.subjectdengue
dc.subjectyellow fever
dc.subjectchikungunya
dc.subjectZika viruses.
dc.subjectvector
dc.subjectWestern region
dc.subjectCoastal region
dc.titleCharacteristics of Aedes aegypti adult mosquitoes in rural and urban areas of western and coastal Kenya
dc.typeArticle

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