Entomological and transmission risk indices of malaria vectors in selected communities in osun state, Nigeria
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Date
2013
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Abstract
Baseline survey is an integral component of a malaria vector control programme,
providing valuable information on mosquito behaviour that guide the suitability of
chosen interventions. A need assessment of baseline entomological indices towards the
future implementation of indoor residual spray (IRS) was conducted in Osun State,
Nigeria. Indoor resting mosquitoes were collected in human households from three Local
Government Areas. These were morphologically identified, subjected to species specific
polymerase chain reaction (PCR) assay and analyzed for sporozoite infection and blood
meal origin using enzyme linked immunosorbent assay (ELISA). All female Anopheles
identified fed on human blood but tested negative to Plasmodium falciparum
circumsporozoite antigen. The PCR analysis showed a predominance of An. gambiae s.s.
(95%) over An. arabiensis (5%). The preponderance of indoor resting An. gambiae s.s
and the incidence of exophilic An. arabiensis suggest a combination of IRS and long
lasting insecticidal nets (LLINs) for this region.