Epidemiologia da doença de Chagas nos Municípios de Castelo do Piauí e Pedro II, Estado do Piauí, Brasil

Abstract

Triatoma brasiliensis, Triatoma pseudomaculata and Rhodnius nasutus were captured in artificial and natural echotopes in ten localities situated in rural areas of Castelo do Piauí and Pedro II, State of Piauí, Brazil. Nymphal instars predominated and birds were the main blood meal source for triatomines. T. brasiliensis was the only triatomine captured inside the houses searched, harbouring flagellates morphologically and biologically indistinguishable from Trypanosoma (Schizotrypanum) cruzi. Specific serology against T. cruzi by indirect immunofluorescence (IFI) test showed 21.7% positive reactions among 566 inhabitants examined. The results suggest that in these localities the active transmission of Chagas' disease occurs.

Epidemiology of Chagas disease in Jaguaruana, Ceará, Brazil. I. Presence of triatomines and index of Trypanosoma cruzi infection in four localities of a rural area

“…In this situation the prevalence of R. nasutus was observed, a fact that can be explained by presence of straws and birds. In the roofs of the goat and sheep corrals and hen-houses T. brasiliensis associated to T. pseudomaculata was frequently found, however, always with prevalence of the first, as already mentioned by Alencar (1987), Bento et al (1989), and Gomes (1993).…”

Spatial distribution of synanthropic triatomines in Piaui State, Northeastern Brazil

“…In the same period, it was demonstrated that the municipality of Oeiras was considered an area of active transmission due to the presence of domiciliary triatomines infected with T. cruzi, and children under 5 years old presenting positive serology for the disease 21 . In addition to this study, several others were carried out showing both, the distribution and the seropositivity of triatomines in the State [22][23][24][25][26] .…”

Fontes alimentares de Triatoma pseudomaculata no Estado do Ceará, Brasil

“…O registro de uma ninfa de 5º estádio em domicílio no município de Salitre e 10 adultos em uma escola no de Crato, mostra a importância epidemiológica nesses municí-pios. É provável que o baixo grau de domiciliação observado seja, em parte, devido ao uso de inseticidas nas campanhas anuais de controle da doença de Chagas, ocorridas na região, pois o tratamento anual no domicílio o mantém livre de infestações (Bento et al,4 1989; Oliveira-Filho et al, 14 …”