Clinical and epidemiologic studies of Chagas' disease in rural communities in Oaxaca State, Mexico, and a seven-year follow-up: I. Cerro del Aire.

In 1971, serologic studies in the Mexican state of Oaxaca revealed unusually high chagasic infection in certain communities. This article reports the results of 1973 and 1980 follow-up work performed in one of those communities, Cerro de1 Aire, which shows that the infection caused significant electrocardiographic abnormalities in seropositive persons (as compared to seronegative persons), without there having been evident progression of those abnormalities as of the end of the follow-up period in 1980.