Abstract
In the serum from 1977 candidates to blood donors from 33 cities in the State of Paraná, Brazil, from January, 1980 to December, 1983, immunological tests were carried out for the diagnosis of infections caused by Tripanosoma cruzi, Treponema Pallidum and Hepatitis B virus. The rates of positivity obtained were: 7,2% for american tripanosomiasis, 0,7% for syphilis and 0,6% for virus B hepatitis.

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Copyright (c) 1985 Rubens Pontello, Edna Maria Vissoci Reiche, Edilson João Cabrera
