Caracterización de la resistencia a insecticidas organofosforados, carbamatos y piretroides en Culex quinquefasciatus del Estado de Miranda, Venezuela / Characterization of resistance to organophosphate insecticides, carbamates, and pyrethroids in Culex quinquefasciatus from the State of Miranda, Venezuela
Rev. cuba. med. trop
;
51(2): 89-94, May-Aug. 1999.
Article
Dans Espagnol
| LILACS
| ID: lil-333530
ABSTRACT
Resistance of Culex quinquefasciatus from Miranda, Venezuela to the organophosphate insecticides malathion and chlorpirifos was higher than 30x whereas resistance to pyrethroids metylpirimifos, fention, cipametrine, deltametrine, permetrine and lambdacyalotrine and to organochlorate DDT was lower than 4x. Resistance mechanisms were analyzed with piperonyl butoxide synergist (multifunction oxidases) and S.S.S. phosphotrithiate tributyl (DEF, esterase inhibitor). Multifunction oxidases did not play a significant role in resistance to organophosphate insecticides and carbamate; however, esterases were only mechanisms of resistance to malathion and chlorpirifos. The only insecticide affected by DEF and PB was cipermetrine. Biochemical tests revealed a very low frequency of the altered acetylcholinesterase mechanism (0.13). Esterase frequencies were high (1). Electrophoresis exposed the B1, A6 and B6 esterase phenotypes.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Pyréthrines
/
Carbamates
/
Culex
/
Insecticides Organophosphorés
Limites du sujet:
Animaux
Pays comme sujet:
Amérique du Sud
/
Vénézuela
langue:
Espagnol
Texte intégral:
Rev. cuba. med. trop
Thème du journal:
Médecine tropicale
Année:
1999
Type:
Article
Pays d'affiliation:
Cuba
Institution/Pays d'affiliation:
Instituto de Medicina Tropical Pedro Kouri/CU
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