Malaria vector bionomics and transmission in irrigated and non-irrigated sites in western Kenya

• DOI: 10.1007/s00436-022-07678-2
• Publication Date: 2022-10-07T03:26:30Z
• Authors: Benyl M. Ondeto; Xiaoming Wang; Harrysone Atieli; Pauline Winnie Or...; Kevin O. Ochwedo; Collince J. Omondi; Wilfred O. Otambo; Daibin Zhong; Guofa Zhou; Ming-Chieh Lee; Simon M. Muriu; David O. Odongo; Horace Ochanda; James Kazura; Andrew K. Githeko; Guiyun Yan
• Keywords: Bionomics; Blood meal

Irrigation not only helps to improve food security but also creates numerous water bodies for mosquito production. This study assessed the effect of irrigation on malaria vector bionomics and transmission in a semi-arid site with ongoing control program. The effectiveness CDC light traps surveillance vectors was evaluated relative human landing catches (HLCs) method. Adult mosquitoes were sampled two sites representing irrigated non-irrigated agroecosystems western Kenya using variety trapping methods. samples identified species assayed host blood meal source Plasmodium spp. sporozoite infection polymerase chain reaction. Anopheles arabiensis dominant occurred significantly higher densities compared site. difference indoor resting density An. during dry wet seasons significant. Other species, including funestus, coustani, pharoensis, collected. funestus 0.23 while almost none this collected index (HBI) 3.44% than 0.00% In site, HBI 3.90% 5.20% outdoor, respectively. 49.43% annual entomologic inoculation rate 0.41 0.30 infective bites/person/year respectively, whereas no observed trap performed consistently HLC terms density. These findings demonstrate that agriculture may increase risk areas highlight need complement existing interventions novel tools targeting larvae both outdoor biting populations.