Doctors warn your 'stomach bug' may actually be a parasite that's harder to detect

Health officials are warning that what many people dismiss as a routine summer stomach bug may actually be cyclosporiasis, as the U.S. experiences one of its largest foodborne parasite outbreaks on record.

The Centers for Disease Control and Prevention has confirmed more than 1,600 domestic cases of cyclosporiasis since May, with over 5,100 additional cases currently under investigation.

The intestinal infection is caused by Cyclospora (Cyclospora cayetanensis), a microscopic parasite...