infections
Cystoisosporiasis
Introduction
Cystoisosporiasis is infection with the parasiteCystoisospora (Isospora) belli. The main symptoms are watery diarrhea with abdominal cramping and nausea. People can become infected withCystoisosporaby consuming food or water contaminated with the parasite. Cystoisosporiasis symptoms are more severe and prolonged in people with a Overview of Immunodeficiency Disorders , such as people with Symptoms vary but include watery diarrhea, abdominal cramping, fever, and weight loss. Doctors usually diagnose the infection by identifyingCystoisosporain a sample of stool. Cystoisosporiasis can be treated withtrimethoprim/sulfamethoxazole (TMP/SMX). (See also Overview of Parasitic Infections .) Cystoisosporiasis is most common in tropical and subtropical climates. When encountered in the United States, it is usually in immigrants or travelers with exposure in endemic areas. 