Sylvatic Triatoma infestans (Reduviidae, Triatominae) in the Andean valleys of Bolivia

Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ, Brasil / Universidad Mayor San Simon, Facultad de Medicina. Centro Universitário de Medicina Tropical. Cochabamba, Bolivia / Ministerio de la Salud. Programa Nacional de Control de Chagas. La Paz, Bolivia.
UR 016. Institut de Recherche pour le Développment. Montpellier, France.
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecologia, Genética y Evolucion. Laboratorio de Eco-Epidemiologia. Buenos Aires, Argentina.
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecologia, Genética y Evolucion. Laboratorio de Eco-Epidemiologia. Buenos Aires, Argentina.
Universidad Mayor San Simon, Facultad de Medicina. Centro Universitário de Medicina Tropical. Cochabamba, Bolivia.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Protozoologia. Rio de Janeiro, RJ, Brasil.
Universidad Mayor San Simon, Facultad de Medicina. Centro Universitário de Medicina Tropical. Cochabamba, Bolivia / UR 016. Institut de Recherche pour le Développment. Montpellier, France.

Abstract

Triatoma infestans is the main vector of Chagas disease in the Southern Cone countries. Wild populations of T. infestans appear widespread throughout the Andean valleys of Bolivia. In Cotapachi (2750 m asl), all sorts of rocky outcrops, regardless of their size, provided good refuges for T. infestans. Of the 1120 ecotopes investigated, 330 (29.5%) contained triatomines and 92% of the collected insects were nymphal instars. In the cold season, triatomine densities were similar in small and large outcrops. During the hot season, bug densities were higher in the larger outcrops, particularly in those located in peridomestic sites. T. infestans populations apparently produced one generation per year. Over half the sampled bugs were positive for T. cruzi infection. At Mataral (1750 m asl), a site located in the inter-Andean Chaco, a new morph of T. infestans was detected in a sylvatic environment.

Keywords in Portuguese

Triatoma infestans
Trypanosoma cruzi
Populações silváticas
Vale andino
Bolívia
Doença de Chagas

Keywords

Triatoma infestans
Trypanosoma cruzi
Sylvatic populations
Andean valley
Bolivia
Chagas disease

Publisher

Elsevier 12 Months

Citation

CORTEZ, Mirko Rojas et al. Sylvatic Triatoma infestans (Reduviidae. Triatominae) in the Andean valleys in Bolivia. Acta Tropica, v. 102, p. 47-54, 2007.

DOI

10.1016/j.actatropica.2007.02.014

ISSN

0001-706X

Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/35819

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Copyright

Restricted access

Embargo date

2025-01-01

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