NDLI: Distribution of Pyrethroid Resistant Populations of Triatoma infestans in the Southern Cone of South America

Content Provider	PubMed Central
Author	Gomez, Marinely Bustamante Gonçalves, Diotaiuti Liléia Gorla, David E.
Editor	Gürtler, Ricardo E.
Copyright Year	2016
Abstract	The elimination of T. infestans in wide areas of the Southern Cone countries of South America and good results in other vector control initiatives showed the high susceptibility of triatomines to pyrethroid insecticides. Despite the constant efforts of vector control, the success was not complete in several areas of the Gran Chaco region of Argentina, Bolivia and Paraguay and parts of the Inter-Andean Valleys of Bolivia, and southern Peru, where persistent populations of domestic and wild T. infestans still persist. Additionally, high levels of insecticide resistance leading to control failures were described in the biogeographic region of the Gran Chaco, within the area of persistent house reinfestation after insecticide application. The influence of environmental variables on the geographic distribution of triatomine was previously studied for several species, showing significant correlations between Triatominae species occurrence and a number of environmental variables. We investigated the association between the spatial distribution of pyrethroid resistant populations of T. infestans and environmental variables. This study shows that pyrethroid resistance in T. infestans causing control failures is a highly localized event, spatially associated with the putative dispersion origin of the species, the location of the intermediate cytogenetic group, and with a particular combination of environmental variables, near the border between Argentina and Bolivia. The strong linear relationship found between LD50 and RR50 suggest RR50 might not be the best indicator of insecticide resistance in triatomines.
Related Links	http://dx.doi.org/10.1371/journal.pntd.0004561
Starting Page	4561
File Format	PDF
ISSN	19352735
e-ISSN	19352735
Journal	PLoS Neglected Tropical Diseases
Issue Number	3
Volume Number	10
Language	English
Publisher	Public Library of Science
Publisher Date	2016-03-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Pharmacology, Toxicology and Pharmaceutics(all) Public Health, Environmental and Occupational Health Infectious Diseases Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Public Health, Environmental and Occupational Health Pharmacology, Toxicology and Pharmaceutics

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