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Detection of high percentage of Trypanosoma cruzi infection, the etiologic agent of Chagas disease, in wild populations of Colombian Caribbean triatomines

In Colombia it is estimated that about 900,000 persons are infected with T. cruzi. There are 25 triatomine species and 5 of them have been reported infected with T. cruzi in the Colombian Caribbean region. In order to obtain more information about the triatomine populations in this region, 89 wild triatomines were collected from four Colombian Departments. The most frequent specie collected was Rhodnius pallescens (65%), followed by Rhodnius prolixus (20%), Panstrongylus geniculatus (10.1%) and Triatoma dimidiata (1%), found in Bolivar, Córdoba, Atlántico/Sucre, and Bolívar Departments, respectively. The majority of triatomines (95.5%) were captured in the arboreal ecotope and 76.4% were found infected with T. cruzi. Interestingly, some of these triatomine species were captured in Departments in which they had not previously been reported and also new finding of triatomine species infected with T. cruzi. These results are relevant, because they can be consequence of a continued geographical expansion of this parasite, not only in the Colombian Caribbean region, but even in all Latin America. The information presented here will contribute in the surveillance and control strategies of the vectors infected with T. cruzi that circulate in four department of Colombian Caribbean region in order to interrupt the transmission to human dwelling.