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The largest orally transmitted microepidemic of Chagas disease (ChD) was detected in 2007 at a school in Caracas, Venezuela, affecting 103 people. This work describes the clinical and laboratory findings in 22 hospitalized patients. We investigated the presence of parasites and specific IgM and IgG antibodies by ELISA and Indirect Hemagglutination. Parasites were found in 5 individuals (22.7%) and anti-Trypanosoma cruzi antibodies in 86.3% (19/22). The admission diagnoses were dengue, urinary infection, histoplasmosis, polimyositis, autoimmune disease and mononucleosis. Long lasting daily fever was found in 18/22 (81.8%) and edema in 9 (40.9%) persons. 13/19 confirmed cases had cardiac involvement; 7 (31.8%) with pericardial effusion and one (4.5%) with atrial fibrillation, who needed cardioversion. Other findings were asthenia, myalgia, headache, precordial and abdominal pain. There were alterations in the values of troponin (8/11), ESR (8/14), PCR (14/16), LDH (8/9) and leukocytes (8/21). Three persons did not show anti-T. cruzi antibodies and one confirmed case died. Clinical detection of orally transmitted ChD is difficult because there is no association with the vector or parasite gateway and symptoms, are usually nonspecific. The acute illness can progress to severe disease when diagnosis and treatment are delayed.

revista de patologia tropical / journal of tropical pathology

EVALUACIÓN CLÍNICA Y DE LABORATORIO DE PACIENTES HOSPITALIZADOS DURANTE EL PRIMER BROTE URBANO DE ENFERMEDAD DE CHAGAS DE TRANSMISIÓN ORAL EN VENEZUELA