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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 106, No. 4, 2011, pp. 445-450
Bioline Code: oc11076
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 106, No. 4, 2011, pp. 445-450

 en Distribution and infection of triatomines (Hemiptera: Reduviidae) by Trypanosoma cruzi check for this species in other resources in the state of Michoacán, Mexico
Martínez-Ibarra, José Alejandro; Valencia-Navarro, Ignacio; León-Saucedo, Salvador; Ibáñez-Cervantes, Gabriela; Bustos-Saldaña, Rafael; Montañez-Valdez, Oziel Dante; Díaz, Óscar Iván Cervantes & Nogueda-Torres, Benjamín

Abstract

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 check for this species in other resources to the human population in this area. Four triatomine species ( Triatoma barberi check for this species in other resources , Triatoma dimidiata check for this species in other resources , Meccus pallidipennis check for this species in other resources and Meccus longipennis check for this species in other resources ) 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.

Keywords
Triatominae, Chagas disease, Michoacán, Mexico

 
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