Loss of pyrethroid resistance in newly established laboratory colonies of Aedes aegypti.

Background: Resistance to pyrethroid insecticides in Aedes aegypti has become widespread after almost two decades of the frequent use of these pesticides to reduce arbovirus transmission. Despite this resistance, pyrethroids continue to be used because they are relatively inexpensive and have low human toxicity. Resistance management has been proposed as a way to retain the use of pyrethroids in natural populations.

Development of a novel trap for the collection of black flies of the Simulium ochraceum complex.

Background: Human landing collections are currently the standard method for collecting onchocerciasis vectors in Africa and Latin America. As part of the efforts to develop a trap to replace human landing collections for the monitoring and surveillance of onchocerciasis transmission, comprehensive evaluations of several trap types were conducted to assess their ability to collect Simulium ochraceum sensu lato, one of the principal vectors of Onchocerca volvulus in Latin America.

Methodology/principal Findings: Diverse trap designs with numerous modifications and bait variations were evaluated for their abilities to collect S.

Development and laboratory evaluation of chemically-based baited ovitrap for the monitoring of Aedes aegypti.

Aedes (Stegomyia) aegypti is considered to be the most important dengue vector worldwide. Studies were conducted to design and evaluate a chemically-based baited ovitrap for monitoring Ae. aegypti under laboratory conditions.

[Behavioral response of Anopheles albimanus to volatile compounds collected inside houses from the south of Chiapas, Mexico].

Objective: To determine effects of volatile compounds in homes on the behavioral response of Anopheles albimanus.

Material And Methods: The study was conducted in January 2006, in the village of Nueva Independencia village, Suchiate, Chiapas. Volatile compounds were collected inside homes and the extracts were tested on unfed females in a Y-olfactometer.