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

S Kibret
E Boelee
B Petros
H Tekie


Larval and adult anophelines were sampled around Ziway, Central
Ethiopia. Throughout the study period, significantly higher densities of
Anopheles pharoensis and An. arabiensis were found in the village with
irrigation than in the village without. Canal leakage pools, irrigated fields
and irrigation canals were the major sources of Anopheles larvae. Most
adult anophelines were found to feed on humans, especially before 22hrs,
and up to 1% were infected with malaria parasites. This study demonstrated
that due to poor maintenance, irrigation schemes create conducive breeding
grounds for malaria vector mosquitoes and hence increase the risk of
malaria transmission.
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eISSN: 0378-0813