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1 July 2011 Susceptibility of Sylvatic Triatoma infestans from Andeans Valleys of Bolivia to Deltamethrin and Fipronil
Gonzalo Roca Acevedo, Gastón Mougabure Cueto, Mónica Germano, Pablo Santo Orihuela, Mirko Rojas Cortez, François Noireau, María Inés Picollo, Claudia Vassena
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Abstract

We describe the susceptibility to deltamethrin and fipronil of four sylvatic Triatoma infestans populations from the Andean valleys of Bolivia. Fifty percent lethal doses were determined from topical application of insecticide on first instars, and mortality was assessed after 24 h for deltamethrin and 48 h for fipronil. In comparison with a reference strain from Argentina, the Bolivian populations showed deltamethrin 50 percent lethal dose ratios ranging from 1.9 to 17.4. In the case of fipronil, an insecticide never used for control of T. infestans, the Bolivian populations showed even higher variation in toxic response, with relative susceptibilities ranging from 0.5 to 139.2. However, although the sylvatic T. infestans toxicological profiles differ from each other and from those of the domiciliary population studied in this work, there were no significant differences in the activities of P450 mono-oxygenases and pyrethroid esterases between the reference strain and the studied populations.

© 2011 Entomological Society of America
Gonzalo Roca Acevedo, Gastón Mougabure Cueto, Mónica Germano, Pablo Santo Orihuela, Mirko Rojas Cortez, François Noireau, María Inés Picollo, and Claudia Vassena "Susceptibility of Sylvatic Triatoma infestans from Andeans Valleys of Bolivia to Deltamethrin and Fipronil," Journal of Medical Entomology 48(4), 828-835, (1 July 2011). https://doi.org/10.1603/ME10208
Received: 21 September 2010; Accepted: 1 March 2011; Published: 1 July 2011
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KEYWORDS
insecticide susceptibility
sylvatic populations
Triatoma infestans
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