Resumo

ZAPATA-SAAVEDRA, D et al. Wild and domiciled populations of triatoma infestans in communities of the municipality of Mecapaca next to the city of La Paz. Cuad. - Hosp. Clín. [online]. 2019, vol.60, n.2, pp.22-31. ISSN 1562-6776.

Abstract OBJECTIVE: To determine the presence of Triatoma infestans and the characteristics of their populations in some communities of the Municipality of Mecapaca next to the city of La Paz. METHODS: The entomological search of Triatoma infestans with mouse bait traps in wild and peridomiciliary or manual sites within homes, was carried out in 11 areas of 8 communities of the Municipality of Mecapaca, determining the altitude above sea level and their geographical location. By means of dichotomous keys according to Lentand Wygodzinski, the morphological identification ofthe captured specimens has been carried out. With direct microscopic observation ofspecimen dejections and molecular analysis by Multiplex PCR, Trypanosoma cruzi infection and DTUs (Discrete Typif¡cation Units) have been determined. RESULTS: Positive sites were found for the presence of T. infestan, with the Entomological Dispersion Index being 50%. Of the total ofthe specimens captured (N = 103), 91 specimens (88%) were individuals in the nymphal phase and 12 individuals (12%) were adults. T. cruzi TcI was characterized and the triatominic trypan index was 50% in individuals captured in the wild zone of Huayhuasi and 16% in individuals captured in the peridomiciliary area of Huajchilla, only 20 km away from the city of La Paz. CONCLUSIONS: The results have confirmed the presence of wild and domiciled populations of T. infestans in wild and domiciliary sites of communities of the Municipality of Mecapaca near the city of La Paz. The finding would determine new geographical distribution schemes of T. infestans populations and human habitat infestation.

Palavras-chave : Chagas disease; Triatoma infestans; Mecapaca; Epidemiological risk.

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