Distribution and infection of triatomines (Hemiptera: Reduviidae) by Trypanosoma cruzi in the state of Michoacán, Mexico

An entomological study of triatomine species was carried out to assess their prevalence in 10 localities of the state of Michoacán, Mexico. Entomological indices were calculated to estimate the risk for vector-borne transmission of Trypanosoma cruzi to the human population in this area. Four triatomine species (Triatoma barberi, Triatoma dimidiata, Meccus pallidipennis and Meccus longipennis) were collected from the study area. This is the first report of M. longipennis and T. dimidiata in Michoacán. M. pallidipennis was significantly (p < 0.05) more abundant than any of the other species collected in the study area. Infection indices were greater than 50% for each of the four collected triatomine species. Significantly more triatomines were collected from intradomiciliary areas than from peridomiciliary or sylvatic areas. Infestation, crowding and density indices were low, whereas colonisation indices were high in five localities. The current vectorial conditions in the study area require continuous entomological and serological surveillance to diminish the risk of T. cruzi transmission to human populations.

Bibliographic Details

Main Authors:	Martínez-Ibarra,José Alejandro, Valencia-Navarro,Ignacio, León-Saucedo,Salvador, Ibáñez-Cervantes,Gabriela, Bustos-Saldaña,Rafael, Montañez-Valdez,Oziel Dante, Cervantes Díaz,Óscar Iván, Nogueda-Torres,Benjamín
Format:	Digital revista
Language:	English
Published:	Instituto Oswaldo Cruz, Ministério da Saúde 2011
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762011000400010
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