Cyclospora infections rise sharply in Michigan and spread to multiple states

The parasite Cyclospora, which causes cyclosporiasis, is spreading across the United States, with Michigan experiencing the largest surge. The state health department said the number of confirmed cases rose to 572 this week, up from 170 a week earlier. Ohio, North Carolina, Wisconsin, Texas and several other states have also reported cases, according to recent federal data.

"ODH and local health departments are working with neighboring state partners, including Michigan, and federal partners to investigate. This includes conducting interviews to help identify any potential common exposures. At this point, no source has been confirmed," Ohio Health Department spokesman Ken Gordon said.

Previous outbreaks have been linked to contaminated bagged salads, herbs, snow peas, green onions and raspberries. While infections are rarely life-threatening, untreated cases can persist for more than a month and may be more severe in older adults and people with weakened immune systems. Typical symptoms include watery diarrhea, abdominal cramping, nausea, fatigue, weight loss and flu-like signs.

The U.S. Centers for Disease Control and Prevention advises stool testing and treatment with sulfa antibiotics such as Bactrim or Septra, along with rest and fluid intake. Dr. Darien Sutton noted that severe dehydration is a common reason patients seek emergency care.

CDC data through July 1 show at least 20 hospitalizations and 145 reported cases nationwide, affecting individuals aged five to 86, with a majority of patients being female. No deaths have been recorded. The agency indicated that there is no evidence of a single, multi-state outbreak, but several clusters are under investigation.

Public health officials recommend thorough cleaning and cooking of produce to reduce the risk of infection.