Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/20873
Title: Ecology of Triatoma brasiliensis in northeastern Brazil: seasonal distribution, feeding resources, and Trypanosoma cruzi infection in a sylvatic population
Authors: Sarquis, Otilia
Costa, Filipe A. Carvalho
Oliveira, Livia Silva
Duarte, Rosemere
D´Andrea, Paulo Sérgio
Oliveira, Tiago Guedes de
Lima, Marli Maria
Affilliation: Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Eco-Epidemiologia da Doença de Chagas. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Sistemática Bioquímica. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Eco-Epidemiologia da Doença de Chagas. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Escola Nacional de Saúde Pública Sergio Arouca. Departamento de Ciências Biológicas. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Eco-Epidemiologia da Doença de Chagas. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Eco-Epidemiologia da Doença de Chagas. Rio de Janeiro, RJ. Brasil.
Abstract: We assessed some ecological parameters of Triatoma brasiliensis in rock piles in the state of Ceará during the rainy and dry seasons. The greatest density was in April (median = 12.5 triatomines/site). The greatest abundance was in December, when the insects were more dispersed and the density per site was lower (6 triatomines/site). The nutritional status of females and 5th instar nymphs was increased in July. The rate of T. cruzi infection reached its highest peak in July (10.9%). ELISA revealed that the principal food sources were birds (33.1%), followed by armadillos (18.8%). Food sources were more frequently identified during the rainy season. T. brasiliensis specimens collected in the drought tended to: i) present lower rates of T. cruzi infection and gut content reactivity to tested antisera, ii) have a poorer nutritional status, iii) exhibit lower fecundity, iv) be more dispersed among the studied collection sites, and v) be more abundant and easily collected in the surface of the rocks, possibly reflecting an increased searching for blood meals. Such findings underscore epidemiological concerns and allow inferences about the season when triatomines can more frequently invade the peridomestic environment in search of food and recolonize artificial structures.
Keywords: Chagas Disease
Triatoma brasiliensis
sylvatic population
Ecology
Trypanosoma cruzi
keywords: Doença de Chagas
Triatoma brasiliensis
Trypanosoma cruzi
Ecologia
Issue Date: 2010
Publisher: Wiley
Citation: SARQUIS, Otilia; et al. Ecology of Triatoma brasiliensis in northeastern Brazil: seasonal distribution, feeding resources, and Trypanosoma cruzi infection in a sylvatic population. Journal of Vector Ecology, v.35, n.2, p.385-394, 2010.
ISSN: 1081-1710
Copyright: restricted access
Appears in Collections:IOC - Artigos de Periódicos

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