INVESTIGADORES
PICOLLO Maria Ines
artículos
Título:
Contribution of general esterases to pyrethroid resistant Triatoma infestans (Hemiptera: Reduviidae) from Argentina and Bolivia
Autor/es:
SANTO ORIHUELA P; MARÍA INÉS PICOLLO
Revista:
ACTA TOXICOLóGICA ARGENTINA
Editorial:
ASOCIACIÓN TOXICOLÓGICA ARGENTINA
Referencias:
Lugar: Buenos Aires; Año: 2011 vol. 19 p. 32 - 40
ISSN:
0327-9286
Resumen:
The objective of this
work was the study of the relative contribution of general esterases:
á-napthyl acetate (á-NA) and p-nitro phenyl acetate (p-NPA) in
pyrethroid-resistant T. infestans from these locations. We used
deltamethrin-resistant populations previously collected in two areas
in Argentina (Salta and La Rioja) and one area in Bolivia (Tarija). In
this study, frequency histograms of á-NA and p-NPA esterase
activities, exhibited similar patterns between Bolivian population and
the susceptible counterpart. In contrast, Argentinean field
populations showed higher proportion of increased enzyme activity
individuals. These results clearly demonstrated that resistances in
Argentinean and Bolivian field populations are based on different
mechanisms, suggesting that enzyme-based pyrethroid resistance in this
species has multiple origins.