The causative organism, Leptospira interrogans, is a spirochete commonly found in Latin America. It is excreted in urine of infected animals and enters humans through non-intact skin, mucous membranes, and by inhalation and ingestion. It is usually a self-limiting disease, and, although rare in pregnancy, the organism has been detected in the placenta and amniotic fluid. Infections have been associated with fetal death in up to 50% of cases as well as active disease in newborn infants. Early diagnosis with urine and serological tests and treatment with antibiotics is critical (58).

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