Abstract

RODRIGUEZ, María M.; BISSET, Juan A.  and  FERNANDEZ, Ditter. Determination in vivo of the role of esterase and gluthation transferase enzymes in pyrethroid resistance of Aedes aegypti (Diptera: Cullicidae) . Rev Cubana Med Trop [online]. 2007, vol.59, n.3. ISSN 0375-0760.

An in vivo study of two synergists, that is, Triphenil phosphate -specific esterase inhibitor- and ethacrynic acid specific gluthation transferase inhibitor- was performed to determine if these enzymes were responsible for pyrethroid resistance of Aedes aegypti. To this end, two insecticide resistant Aedes aegypti strains were used, one strain selected with temephos by six selection generations (SAN-F6) and the other strain with delmamethrin by 12 selection generations (SAN-F12), being both strains resistant to pyrethroid insecticices. Through the use of TPP and EA synergists, it was proved that esterase and gluthation-s-transferase (GST) enzymes were responsible for pryrethroid resistance of these strains. These results showed the existence of cross-resistance and multidrug resistance, which should be taken into account for insecticide use strategies aimed at vector control.

Keywords : Aedes aegypti; sinergists; esterases; acetylcholinesterase; glutathion transferase.

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