Abstract
This study aimed to evaluate the Chagas Disease Control Program which has operated since 1982 in the municipality of Berilo in the Jequitinhonha Valley, Minas Gerais, Brazil, based on evaluation of 5,242 domiciliary units (DUs) and 7,807 outbuildings over an eight-year period of epidemiological surveillance implanted in 1997. A total of 391 triatomines (280 Panstrongylus megistus and 111 Triatoma pseudomaculata) were captured, indicating the continued predominance of the former species. However, Triatoma pseudomaculata is clearly becoming more important in this region, with intradomiciliary colonies being detected in recent years. Entomological parameters, such as dispersion (17%) and intradomiciliary infestation (0.15%) indices, are compatible with the results of the epidemiological surveillance. The majority of DUs were of construction type A (plaster over bricks) or C (plaster over adobe). Twenty-five percent of the inhabitants of the DUs infested by triatomines were reactive in ELISA, IHA and IIF tests for Trypanosoma cruzi antigens.
Highlights
This study aimed to evaluate the Chagas Disease Control Program which has operated since 1982 in the municipality of Berilo in the Jequitinhonha Valley, Minas Gerais, Brazil, based on evaluation of 5,242 domiciliary units (DUs) and 7,807 outbuildings over an eight-year period of epidemiological surveillance implanted in 1997
In 1940, Panstrongylus megistus was the triatomine species most often captured in Minas Gerais (79.8%), followed by Triatoma sordida (9.7%) and Triatoma infestans (9.3%)[10]
Triatoma infestans was the triatomine species most often captured in Brazil (70.8%), with a high prevalence of infection with Trypanosoma cruzi[14]
Summary
This study aimed to evaluate the Chagas Disease Control Program which has operated since 1982 in the municipality of Berilo in the Jequitinhonha Valley, Minas Gerais, Brazil, based on evaluation of 5,242 domiciliary units (DUs) and 7,807 outbuildings over an eight-year period of epidemiological surveillance implanted in 1997. A total of 391 triatomines (280 Panstrongylus megistus and 111 Triatoma pseudomaculata) were captured, indicating the continued predominance of the former species. Triatoma pseudomaculata is clearly becoming more important in this region, with intradomiciliary colonies being detected in recent years Entomological parameters, such as dispersion (17%) and intradomiciliary infestation (0.15%) indices, are compatible with the results of the epidemiological surveillance. The triatomine species of major epidemiological importance in Minas Gerais is Panstrongylus megistus, a species endemic to this region that presents a great capacity to invade and colonize houses and their peridomiciles[10]. Triatoma infestans was the triatomine species most often captured in Brazil (70.8%), with a high prevalence of infection with Trypanosoma cruzi[14]. In 1951, Panstrongylus megistus was the only vector species captured inside houses in Minas Novas, which at that time was part of the municipality of Berilo[15]
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