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Revista de Saúde Pública

On-line version ISSN 1518-8787Print version ISSN 0034-8910


FORATTINI, Oswaldo Paulo; FERREIRA, Octávio Alves; SILVA, Eduardo Olavo da Rocha e  and  RABELLO, Ernesto Xavier. Ecological aspects of South American trypanosomiasis: XV - development, variation and permanence of Triatoma sordida, Panstrongylus megistus and Rhodnius neglectus in artificial ecotopes. Rev. Saúde Pública [online]. 1979, vol.13, n.3, pp.220-234. ISSN 1518-8787.

Spontaneous colonies of Triatoma sordida, Panstrongylus megistus, and Rhodnius neglectus developed in experimental fowlhouses were observed for the conditions for their development and the variation and permanence of their components. T. sordida colonization and dispersal is favored by open areas, mainly pasture lands where many dry trees remain as the result of primitive vegetation destruction. Development of P. megistus occurs near residual forests, and it seems that artificial environment attraction is due mainly to the number of peridomestic dwellings. R. neglectus showed a degree of adaptation to the artificial ecotopes and also great dispersal capacity. More intensive production of adults and first nymphs of T. sordida was observed in the first half-year. This pattern seems to show a period of greater infestation by the bug colonies. The presence of visitor nymphs of T. sordida suggests a dispersal capacity of these forms.

Keywords : Trypanosomiasis, South American; Triatoma sordida; Panstrongylus megistus; Rhodnius neglectus; Panstrongylus geniculatus; Triatominae [domiciliation]; Triatominae [dispersal]; Triatominae [variation]; Ecology.

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