Effect of untreated bed nets on blood-fed **Phlebotomus argentipes** in kala-azar endemic foci in Nepal and India
Institute of Development Policy and Management
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Rio de Janeiro
Memorias do Instituto Oswaldo Cruz. - Rio de Janeiro
, p. 1183-1186
Observational studies in the Indian subcontinent have shown that untreated nets may be protective against visceral leishmaniasis (VL). In this study, we evaluated the effect of untreated nets on the blood feeding rates of Phlebotomus argentipes as well as the human blood index (HBI) in VL endemic villages in India and Nepal. The study had a "before and after intervention" design in 58 households in six clusters. The use of untreated nets reduced the blood feeding rate by 85% (95% CI 76.5-91.1%) and the HBI by 42.2% (95% CI 11.1-62.5%). These results provide circumstantial evidence that untreated nets may provide some degree of personal protection against sand fly bites.