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Title: Evaluation of natural foci of Panstrongylus megistus in a forest fragment in Porto Alegre, State of Rio Grande do Sul, Brazil.
Authors: Santos Junior, José Eloy dos
Viola, Mariana Gubert
Lorosa, Elias Seixas
Machado, Evandro Marques de Menezes
Ruas Neto, Antonio Leite
Corseuil, Elio
Keywords: Panstrongylus megistus
Didelphis albiventris
Trypanosoma cruzi
Sylvatic foci
Rio Grande do Sul
Issue Date: 2013
Citation: SANTOS JUNIOR, J. E. et al. Evaluation of natural foci of Panstrongylus megistus in a forest fragment in Porto Alegre, State of Rio Grande do Sul, Brazil. Revista da Sociedade Brasileira de Medicina Tropical, v. 46, p. 575-583, 2013. Disponível em: <>. Acesso em: 08 nov. 2014.
Abstract: Introduction: Panstrongylus megistus is commonly found in wild environments of the State of Rio Grande do Sul, Brazil. The aim of this study was to characterize the network of refuges used by triatomine in a forest fragment of Porto Alegre and to identify Trypanosoma cruzi infection, associated hosts and the epidemiological importance of both hosts and triatomines. Methods: Techniques including the spool-and-line method and active searching (transects) were used to identify natural foci. Results: The food source for each triatomine was determined using the precipitin test, and the infection of marsupials was determined by xenodiagnosis. A total of 33 adults (domestic environment) and 27 nymphs (wild environment) of P. megistus were found in addition to 43 Didelphis albiventris specimens. The infection rates of triatomine adults, triatomine nymphs and opossums with T. cruzi I were 64%, 73% and 69%, respectively. Birds, rodents and opossums were the main resources used by triatomine. Conclusions: This work presents the fi rst characterization of a natural focus of P. megistus in Rio Grande do Sul. The natural characteristics of this focus and its implication in the transmission of T. cruzi are discussed.
ISSN: 0037-8682
metadata.dc.rights.license: A Revista da Sociedade Brasileira de Medicina Tropical permite distribuição da obra sob uma licença idêntica a do Editor. Permite o armazenamento das versões pré-print e pós-print. Fonte: Diadorim <>. Acesso em 23 jan. 2017.
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