Cyclospora infections are characterized by watery diarrhea, with frequent, sometimes explosive, stools. Other symptoms include loss of appetite, substantial weight loss, bloating, increased flatus, stomach cramps, nausea, fatigue, low-grade fever and vomiting. Diarrhea may last 9-43 days in otherwise healthy persons, but it may continue for months in immunocompromised persons. Asymptomatic and relapsing infections occur. Most reported cases have occurred during spring and summer.