Several types of fresh produce from various countries have been implicated in the transmission of cyclosporiasis, a gastrointestinal infection caused by a microscopic intestinal protozoan parasite, Cyclospora cayetanensis. For example, fresh raspberries, snow peas, and mesclun lettuce imported from Guatemala have been implicated in U.S. outbreaks. The involvement of three different vegetables in outbreaks during 1997 highlights the need for prevention and control measures to ensure the safety of produce that is eaten raw and the need for an improved understanding of the epidemiology of Cyclospora.