Roxana CarrascoHortensia MiguezClara CamachoLourdes EchalarSuzana RevolloTania AmpueroJean-Pierre Dedet2026-03-222026-03-22199010.1590/s0074-02761990000100011https://doi.org/10.1590/s0074-02761990000100011https://andeanlibrary.org/handle/123456789/48116Citaciones: 45Trypanosoma 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 Immunosorbent Assay (ELISA). The percentages of positivity in these 7 departments have an average of 28% and are distributed as follows: Sta. Cruz 51%, 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 of infection.enTrypanosoma cruziAltitude (triangle)Indirect immunofluorescenceVeterinary medicineImmunofluorescenceChagas diseaseBiologyCapital cityInfection rateVirologyarticle