by Elnaiem DEA, Dakein O, Alawad AMA, Alsharif B, Khogali A, Jibreel T, Osman OF, Has’san H, Atia AM , Elhag M, Den Boer M, Ritmeijer K, Bern C, Alvar J, Khalid N, Courtenay O. PLOS Neglected Tropical Diseases 2020;14(10): e0008774. doi: 10.1371/journal.pntd.0008774
Summary: The sand fly species Phlebotomus orientalis is the predominant vector of visceral leishmaniasis in East Africa. In villages, the vector bites people in their household yard and nearby peri-domestic locations. It’s limited indoor resting behaviour limits the value of vector control using indoor residual insecticide spraying and insecticide-impregnated bed-nets. In this study in eastern Sudan, the authors evaluated the impact of applying pyrethroid to outdoor household boundary fences alone and in addition to the exterior walls of household huts on reducing the abundance of P. orientalis inside and outside houses. A single application to boundary fences and exterior walls reduced numbers of outdoor and peridomestic P. orientalis by 83%-99%; the reduction when treating boundary fences alone was 60%-88%.
