Thousands of Americans have reported cases of cyclosporiasis, an intestinal infection caused by a parasite. • Experts recommend washing hands with soap and water and thoroughly rinsing fresh produce to reduce risk. • Previous outbreaks have been linked to items like bagged salads, fresh cilantro, basil and raspberries. Health officials are investigating a growing outbreak of cyclosporiasis, a parasitic illness that can cause explosive diarrhea and other gastrointestinal symptoms.