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Memórias do Instituto Oswaldo Cruz

Print version ISSN 0074-0276On-line version ISSN 1678-8060

Mem. Inst. Oswaldo Cruz vol.90 no.3 Rio de Janeiro May/June 1995

http://dx.doi.org/10.1590/S0074-02761995000300002 

Ecology of Triatoma rubrovaria (Hemiptera, Triatominae) in wild and peridomestic environments of Uruguay

Roberto Salvatella1 

Raquel Rosa1 

Yester Basmadjian1 

Andres Puime1 

Luis Calegari1 

Jorge Guerrero1 

Maria Martinez1 

Gabriela Mendaro1 

Daniel Briano2 

Carlos Montero3 

Cristina Wisnivesky-Colli4 

Universidad de la Republica, Instituto de Higiene, Departamento de Parasitología. Unidad de Biología Parasitaria, Montevideo, Uruguay

Municipalidad de Rivera, Departamento de Higiene, Uruguay

Municipalidad de Artigas, Departamento de Higiene, Uruguay

Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Argentina

ABSTRACT

This paper describes population structure, spatial distribution and habitat selection of wild and peridomestic populations of Triatoma rubrovaria (Blanchard, 1843). Field studies were carried out at Las Piedras and La Bolsa in the Northern Department of Artigas, Uruguay. A semicircular sampling area, divided in seven or eight triangular sectors was sequentially examined from October 1990 to November 1991. At Las Piedras (typical wild habitat) 1063 T. rubrovaria bugs were collected from 84 of the rocky outcroops ("pedregales"). Abundance varied by season peaking in October-November (spring). Throughout the year, most of the population was made up of third, fourth and fifth instar nymphs; adults were found from October to March. In the peridomestic environment of La Bolsa, however T. rubrovaria was less common and showed a more irregular instar distribution. Colonized ecotopes, were those close to houses. In both sites T. rubrovaria was mainly associated with the geckonid Homonota uruguayensis and the cockroach Blaptica dubia.

Key words: Triatoma rubrovaria; triatomiasis; Uruguay; ecology

 

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