Survey for Cyclospora cayetanensis in domestic animals in an endemic area in Haiti

From January 1997 through July 1998, we examined stool samples from 327 dom estic animals, including pigs, cattle, horses, goats, dogs, cats, guinea pi gs, chicken, ducks, turkeys, and pigeons in Leogane, Haiti, for the presenc e of Cyclospora cayetanensis infection. No coccidian oocysts morphologicall y compatible with C. cayetanensis were detected in any of the animal sample s, despite their living in, or near, households with infected individuals. These results suggest that domestic animals are not reservoir hosts for C. cayetanensis and that in this endemic area, humans: are the only natural ho st for this parasite.