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

Simple item page
cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationKenya Medical Research Instituteen
cg.contributor.affiliationInternational Livestock Research Instituteen
cg.contributor.affiliationUniversity of Nairobien
cg.contributor.crpAgriculture for Nutrition and Health
cg.contributor.donorDepartment for International Development, United Kingdomen
cg.contributor.donorEconomic and Social Research Council, United Kingdomen
cg.contributor.donorNatural Environment Research Council, United Kingdomen
cg.coverage.countryKenya
cg.coverage.iso3166-alpha2KE
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.creator.identifierJohanna Lindahl: 0000-0002-1175-0398en
cg.creator.identifierDelia Grace: 0000-0002-0195-9489en
cg.creator.identifierMohammed Yahya Said: 0000-0001-8127-6399en
cg.creator.identifierBernard Bett: 0000-0001-9376-2941en
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.1093/jme/tjw206en
cg.isijournalISI Journalen
cg.issn0022-2585en
cg.issue2en
cg.journalJournal of Medical Entomologyen
cg.reviewStatusPeer Reviewen
cg.subject.ilriAGRI-HEALTHen
cg.subject.ilriANIMAL DISEASESen
cg.subject.ilriENVIRONMENTen
cg.subject.ilriIRRIGATIONen
cg.subject.ilriRVFen
cg.subject.ilriZOONOTIC DISEASESen
cg.volume54en
dc.contributor.authorSang, R.en
dc.contributor.authorLutomiah, J.en
dc.contributor.authorSaid, Mohammed Yahyaen
dc.contributor.authorMakio, A.en
dc.contributor.authorKoka, H.en
dc.contributor.authorKoskei, E.en
dc.contributor.authorNyunja, A.en
dc.contributor.authorOwaka, S.en
dc.contributor.authorMatoke-Muhia, D.en
dc.contributor.authorBukachi, S.en
dc.contributor.authorLindahl, Johanna F.en
dc.contributor.authorGrace, Deliaen
dc.contributor.authorBett, Bernard K.en
dc.date.accessioned2017-01-10T08:07:01Zen
dc.date.available2017-01-10T08:07:01Zen
dc.identifier.urihttps://hdl.handle.net/10568/78635
dc.titleEffects of irrigation and rainfall on the population dynamics of Rift Valley fever and other arbovirus mosquito vectors in the epidemic-prone Tana River County, Kenyaen
dcterms.abstractRift Valley fever (RVF) is a mosquito-borne viral zoonosis that is found in most regions of sub-Saharan Africa, and it affects humans, livestock, and some wild ungulates. Outbreaks are precipitated by an abundance of mosquito vectors associated with heavy persistent rainfall with flooding. We determined the impact of flood-irrigation farming and the effect of environmental parameters on the ecology and densities of primary and secondary vectors of the RVF virus (RVFV) in an RVF-epidemic hotspot in the Tana River Basin, Kenya. Mosquito sampling was conducted in farms and villages (settlements) in an irrigated and a neighboring nonirrigated site (Murukani). Overall, a significantly higher number of mosquitoes were collected in farms in the irrigation scheme compared with villages in the same area (P < 0.001), or farms (P < 0.001), and villages (P = 0.03) in Murukani. In particular, key primary vectors of RVFV, Aedes mcintoshi Marks and Aedes ochraceous Theobald, were more prevalent in the farms compared with villages in the irrigation scheme (P = 0.001) both during the dry and the wet seasons. Similarly, there was a greater abundance of secondary vectors, particularly Culex univittatus Theobald and Culex pipiens (L.) in the irrigation scheme than in the Murukani area. Rainfall and humidity were positively correlated with mosquito densities, particularly the primary vectors. Adult floodwater mosquitoes and Mansonia spp. were collected indoors; immatures of Ae. mcintoshi and secondary vectors were collected in the irrigation drainage canals, whereas those of Ae. ochraceous and Aedes sudanensis Theobald were missing from these water bodies. In conclusion, irrigation in RVF endemic areas provides conducive resting and breeding conditions for vectors of RVFV and other endemic arboviruses.en
dcterms.accessRightsOpen Access
dcterms.audienceScientistsen
dcterms.available2016-12-22en
dcterms.bibliographicCitationSang, R., Lutomiah, J., Said, M., Makio, A., Koka, H., Koskei, E., Nyunja, A., Owaka, S., Matoke-Muhia, D., Bukachi, S., Lindahl, J., Grace, D. and Bett, B. 2017. 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): 460–470.en
dcterms.extentp. 460-470en
dcterms.issued2017-03en
dcterms.languageen
dcterms.licenseCC-BY-NC-4.0
dcterms.publisherOxford University Pressen
dcterms.subjectanimal diseasesen
dcterms.subjectzoonosesen
dcterms.typeJournal Article

Files

License bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.87 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ILRI articles in journals
CRP A4NH outputs
Dynamic drivers of disease in Africa
ILRI animal and human health program outputs (2017–2024)