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Reactivation of Trypanosoma cruzi transmission by native vectors with different domiciliation capabilities is a major concern for Chagas disease control programs. However, Triatoma venosa, a native vector infected with T. In this study, the aim was to describe the eco-epidemiological aspects of T. For this, we designed a comprehensive, multi-faceted study in 6 rural villages and performed: i A cross-sectional serological and molecular study enrolling people and 58 domestic dogs living within 80 households, ii a domestic entomological survey, iii a determination of the natural infection and blood meal source in collected triatomine bugs, and iv an evaluation of synanthropic mammal infection by parasitological and molecular tools.
The T. Most infected humans were adults between the ages of 55 and 85 years old. No evidence of T. In total, 38 triatomine bugs were collected inside dwellings and peridomestic areas: No evidence of R. Two feeding sources were identified in T. Lastly, seven D. The results suggest the existence of T. A major concern for Chagas disease control programs is transmission reactivation by native vectors that are not commonly found living within the domestic environment.
In Colombia, transmission by primary vector species was certified as interrupted in Miraflores municipality in , however other secondary native species have been found entering human dwellings in rural areas, emphasizing the need for entomological surveillance.
In this study we collected and analyzed human and animal blood samples, and secondary vector species from six rural villages to detect Trypanosoma cruzi infections. The results show evidence of active infection among three native vector species, domestic canines, and peridomestic opossums.
Our results are important, as vector species ecology continues to adapt warranting increased entomological surveillance to assess human transmission risk in an area perceived as free of Chagas disease transmission. This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.