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Free Content Long-lasting insecticidal nets fail at household level to reduce abundance of sandfly vector Phlebotomus argentipes in treated houses in Bihar (India)

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Summary Objective  To determine whether the use of long-lasting insecticidal nets (LLINS) at household level are effective in reducing the abundance of , vector of anthroponotic visceral leishmaniasis in India, Nepal and Bangladesh. Methods  The impact of two long-lasting nets (Olyset and PermaNet) on indoor sandfly abundance was evaluated in selected houses of three endemic hamlets in Bihar (India). It was assumed that most sandflies breed inside the houses and that LLINs would progressively reduce the indoor density during the reproduction season. A campaign of indoor spraying with dichloro-diphenyl-trichloroethane (DDT) interfered with the trial but did not affect the sandfly population. Results  Only the density of males of was significantly reduced by both the LLINs but not the females. Conclusions  These findings suggest that most female sandflies are coming from outside and that LLINs do not reduce their entry rate.


Déterminer si l’utilisation à grande échelle de moustiquaires à insecticides durables (MID) est une stratégie plus durable que la pulvérisation de résidu d’intérieur pour le contrôle de Phlebotomus argentipes, vecteur de la leishmaniose viscérale anthroponotique en Inde, au Népal et au Bangladesh. Méthodes: 

L’impact de deux types de moustiquaires durables (Olyset et PermaNet) sur la densité du phlébotome a étéévaluée dans des maisons sélectionnées dans trois hameaux endémiques de Bihar (Inde). Il a été supposé que la plupart des phlébotomes se reproduisent à l’intérieur des maisons et que les MID réduiraient progressivement la densitéà l’intérieur pendant la saison de reproduction. Une campagne de pulvérisation de DDT à l’intérieur des maisons a interféré avec l’étude, mais n’a pas affecté la population de phlébotomes. Résultats: 

Seule la densité des mâles, mais pas celle des femelles de P. argentipes, a été significativement réduite par les MID. Conclusions: 

La plupart des femelles du phlébotome semblent provenir de l’extérieur et les MID ne réduisent pas leur taux de pénétration.
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Keywords: Indian subcontinent; Phlebotomus argentipes; control moscas de arena; contrôle du phlébotome; indoor residual spraying; leishmaniasis visceral; leishmaniose viscérale; long-lasting nets; moustiquaires durables; pulvérisation de résidu d’intérieur; redes mosquiteras de larga duración; rociamiento residual intradomiciliario; sandfly control; sous-continent indien; subcontinente Indio; visceral leishmaniasis

Document Type: Research Article

Affiliations: 1:  Rajendra Memorial Research Institute of Medical Sciences, Indian Council of Medical Research, Agamkuan Patna, India 2:  Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK 3:  Department of Public Health, Institute of Tropical Medicine, Antwerp, Belgium

Publication date: July 1, 2008

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