Meningoencephalitis Caused by Reactivation of Chagas Disease in Patient Without Known Immunosuppression.

Central nervous system (CNS) involvement in Chagas disease (CD) is an uncommon complication that can result from direct involvement of the parasite or from thromboembolic phenomena. Direct involvement of CNS can occur in both acute and chronic forms of CD, and can also be secondary to reactivation. Reactivation of CD generally occurs in immunosuppressed patients such as those with human immunodeficiency infection or malignancies being rarely described in patients without apparent immunosuppression. We report a case of a patient living for many years in a nonendemic area for CD that presented to the emergency department with sudden onset of neurological symptoms as a result of reactivation of the disease. The microorganism was isolated from cerebrospinal fluid, and despite appropriate use of benznidazole, the patient died of sepsis after 22 days of treatment. Further investigation did not show any apparent cause of immunosuppression. This case report shows the importance of considering the diagnostic possibility of neurological complications from CD reactivation in patients that have ever lived in CD-endemic areas even without apparent underlying immunosuppression. © The American Society of Tropical Medicine and Hygiene.