Comparative study of kala-azar vector control measures in eastern Nepal

Das, ML; Roy, L; Rijal, S; Paudel, IS; Picado, A; Kroeger, A; Petzold, M; Davies, C; Boelaert, M; (2010) Comparative study of kala-azar vector control measures in eastern Nepal. Acta tropica, 113 (2). pp. 162-166. ISSN 0001-706X DOI:

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This study was conducted to explore the most effective vector control tool among indoor residual spraying (IRS), long lasting insecticidal nets (LLINs) and ecological vector management (EVM) as a part of the regional visceral leishmaniasis elimination initiative. Alpha-cypermethrin as IRS, PermaNet (R) as LLINs and plastering the inner walls of houses with lime as EVM were the interventions. One baseline and three follow-up entomological surveys were carried out in all arms using CDC miniature light traps (LT) and mouth aspirators. Comparisons were made between intervention arms and control arms with pre-intervention and post-intervention vector densities. Light traps were found more efficient in the collection of Phlebotomus argentipes in comparison with aspiration. Vector densities were significantly low in both IRS arm (p=0.009 in LT and p<0.001 in aspirator collections) and LLIN arm (p=0.019 in LT and p = 0.023 in aspirator collections) in comparison with control arm. However, in EVM arm, there was no significant difference in P. argentipes sand fly density in comparison with control arm (p = 0.785) in LT collections in follow-up surveys. Hence, IRS was found most effective control measure to decrease vector density. LLINs were also found effective and can be considered as a promising alternative vector control tool in VL elimination initiative. (C) 2009 Elsevier B.V. All rights reserved.

Item Type: Article
Keywords: Visceral leishmaniasis elimination, Vector control, Indoor residual, spraying, Long lasting insecticidal nets, Ecological vector management, Nepal, deltamethrin-impregnated bednets, phlebotomus-argentipes, sandfly, vector, cutaneous leishmaniasis, visceral leishmaniasis, trial, curtains, india
Faculty and Department: Faculty of Infectious and Tropical Diseases > Dept of Disease Control
Research Centre: Leishmaniasis Group
PubMed ID: 19879851
Web of Science ID: 274821300011


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