Indication of pyrethroid resistance in the main malaria vector, Anopheles stephensi from Iran.
OBJECTIVE
To investigate insecticide resistance in target species for better insecticide resistance management in malaria control programs.


METHODS
The status of insecticide resistance to different imagicides in Anopheles stephensi (An. stephensi) including DDT 4%, lambdacyhalothrin 0.50%, deltamethrin 0.05%, permethrin 0.75%, cyfluthrin 0.15% and etofenprox 0.50% was performed according to WHO standard method.


RESULTS
The mortality rate to lambdacyhalothrin, permethrin, cyfluthrin, deltamethrin, etofenprox and DDT was (88.0 ± 3.2), (92.0 ± 2.7), (52.0 ± 5.0), (96.0 ± 2.2), (90.0 ± 3.0) and (41.0 ± 5.7) percent, respectively at diagnostic dose for one hour exposure time followed by 24 h recovery period.


CONCLUSIONS
These results showed first indication of pyrethroid resistance in An. stephensi in a malarious area, from southern Iran. There is widespread, multiple resistances in the country in An. stephensi to organochlorine and some report of tolerance to organophosphate insecticides and recently to pyrethroids. However, results of this paper will provide a clue for monitoring and mapping of insecticide resistance in the main malaria vector for implementation of any vector control.
Department of Medical Entomology and Vector Control, School of Public Health & National Institue of Health Research, Tehran University of Medical Sciences, Iran. hvatandoost1@yahoo.com
Hassan
H
Vatandoost
Ahmad Ali
AA
Hanafi-Bojd
D000818:Animals; D000852:Anopheles / Q000187:drug effects*; D007303:Insect Vectors / Q000187:drug effects*; D007305:Insecticide Resistance; D007306:Insecticides; D007492:Iran; D008288:Malaria / Q000635:transmission; D009032:Mosquito Control; D021261:Parasitic Sensitivity Tests; D011722:Pyrethrins
D007306:Insecticides; D011722:Pyrethrins