Response of Triatoma infestans to pour-on cypermethrin applied to chickens under laboratory conditions

Ivana Amelotti, Silvia S Catalá, David E Gorla
2009 Memórias do Instituto Oswaldo Cruz  
This article reports the effects of a pour-on formulation of cypermethrin (6% active ingredient) applied to chickens exposed to Triatoma infestans, the main vector of Chagas disease in rural houses of the Gran Chaco Region of South America. This study was designed as a completely random experiment with three experimental groups and five replicates. Third instar nymphs were fed on chickens treated with 0, 1 and 2 cc of the formulation. Nymphs were allowed to feed on the chickens at different
more » ... ns at different time intervals after the insecticide application. Third-instar nymphs fed on treated chickens showed a higher mortality, took less blood during feeding and had a lower moulting rate. The mortality rate was highest seven days after the insecticide solution application and blood intake was affected until 30 days after the application of the solution.
doi:10.1590/s0074-02762009000300014 pmid:19547876 fatcat:nnfaepam5vef3dwvb2cagfwc4y