Entomological Studies on the Impact of a Small-scale Irrigation Scheme on Malaria Transmission around Ziway, Central Ethiopia

Abstract

Larval and adult anophelines were ' sampled around Ziway, Cenlral
Ethiopia. Throughout the study period, significantly higher del/sities of
Anopheles pharoensis and An. arabiensis were found itl the village with
irrigation thall in the village without. Callal leakage pools, irrigated fields
and irrigatioll callaIs were the major sources of Anopheles larvae, Most
adult anophelines were foulld to feed Oil humans. especially before 22hrs,
and up to 1% were infected with malaria parasites, This !itudy demotlslrated
that due to poor maintenance, irrigation schemes create conducive breeding
grounds for malaria vector mosquitoes and hence i"crease the risk oj
malaria transmission,