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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 93, No. 3, 1998, pp. 339-344
Bioline Code: oc98065
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 93, No. 3, 1998, pp. 339-344

 en Field monitoring of cypermethrin residual effect on the mortality rates of the phlebotomine sand fly Lutzomyia longipalpis in the state of Paraiba, Brazil
Laura Ney Marcelino Passerat De Silans; Jean-Pierre Dedet & Jorge R Arias

Abstract

In a visceral leishmaniasis endemic locality of northeast of Brasil where
all settlements were treated with cypermethrin, a follow-up of Lutzomyia
longipalpis populations was carried out by regular collections. The
residual effect of the insecticide was studied using biological assays on
three different types of walls.  

The results showed that the insecticides had an effect on intradomiciliar Lu. longipalpis populations limited to two months, and had no significant effect on peridomiciliar vector populations. The mortality rates of the tested sandflies were variable according to the type of wall.

The decreasing of the insecticide effect was marked since the 3rd month, and mortality rates were identical whatever the type of wall since the 4th month. Unsufficient residual effect was detected after the 4th month.

Keywords
visceral leishmaniasis - sand flies - control - insecticides - pyrethroids - cypermethrin

 
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