Carrasco, Roxana2026-03-222026-03-221990https://andeanlibrary.org/handle/123456789/9774Trypanosoma cruzi infection was studied in 1,298 sera samples of blood banks from 7 capital departments of Bolivia, using the immunofluorescence test (IFI) and Enzyme Linked Immuno sorbent Assay (ELISA). The percentages of positivity in these 7 departments have an average of 28% and are distributed as follows: Sta. Cruz 5l%, Tarija 45%, Cochabamba 28%, Sucre 39%, La Paz 4.9%, Oruro 6% and Potosi 24%. The prevalence is related with the altitude levels of the different departments. However in Potosi (3,945 m) we found a 24% of prevalence, probably due to the proximity of endemic valleys to the city. The authors suggest a strict control in blood donors since there exists a great risk infection.enENFERMEDAD DE CHAGASBANCOS DE SANGRETRANSMISIÓN DE SANGRESEROLOGÍAINMUNOFLUORECENCIAELISAArticle