The Michigan Department of Health and Human Services (MDHHS) has reported an outbreak of cyclosporiasis, a parasitic illness causing “explosive” diarrhea. Health officials indicate lettuce or salad greens may be responsible, though no specific produce or supplier has been identified.

Dr. Natasha Bagdasarian, MDHHS Chief Medical Executive, emphasized informing residents to help protect their families, noting lettuce frequently appears in the investigation. Updates will be provided as more information surfaces.

MDHHS advises consumers to purchase whole heads of lettuce instead of pre-washed, bagged options. Remove the outer two to three leaves, then wash remaining leaves thoroughly. If possible, cook greens at temperatures above 158 degrees Fahrenheit.

Annually, Michigan reports approximately 50 cyclosporiasis cases. However, since the outbreak’s start in late June, there have been 2,640 cases statewide, with over 40 hospitalizations. Cases have surfaced in other Midwest states as well.

University of Michigan Health Sparrow’s Dr. Ambreen Malik notes the long incubation period, one to two weeks, and vast food distribution networks complicate pinpointing the cause. The parasite, Cyclospora cayetanensis, usually spreads via contaminated food or water, not person to person.

The CDC states that American foodborne outbreaks often relate to fresh produce such as basil, cilantro, and raspberries. Infected individuals may experience watery diarrhea, abdominal cramps, and other symptoms. A healthcare provider’s visit is recommended if symptoms occur; diagnosis requires a stool sample, and antibiotics can treat the condition.

Thorough washing of all fruits and vegetables under running water is crucial before consumption or preparation. Firm produce should be scrubbed with a clean brush, and any bruised or damaged sections should be removed. Refrigerate any cut, peeled, or cooked items promptly.