Michigan Cyclosporiasis Outbreak Surges to 13,909 Cases as 314 Are Hospitalized

Michigan health officials have reported 13,909 cases of cyclosporiasis, marking an increase of more than 1,400 cases in just one week as the state continues to deal with a major outbreak of the parasitic illness.

According to the Michigan Department of Health and Human Services (MDHHS), the latest figures, reported through August 13, include 314 hospitalizations and two deaths associated with the outbreak.

Michigan remains one of the areas hardest hit by the broader U.S. outbreak. Wayne County has recorded the largest number of cases in the state, followed by Oakland County.

What is cyclosporiasis?

Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. Infection can cause prolonged or severe gastrointestinal symptoms, particularly watery diarrhea, along with nausea, stomach cramps, fatigue, loss of appetite and weight loss.

Health authorities have investigated lettuce and salad greens as potential sources of the Michigan outbreak. MDHHS says other foods have not been completely ruled out and its investigation remains ongoing.

Why did Michigan’s case count rise so sharply?

Although the total increased by more than 1,400 cases since the previous weekly update, health officials say the jump does not necessarily represent the same number of new infections occurring during the past week.

Some cases are being added after delays in laboratory testing and reporting. Officials say available data indicate that reports of new infections are slowing.

Michigan authorities also believe that most potentially contaminated produce associated with the outbreak is no longer available for consumption.

The outbreak remains under investigation, and state health officials are continuing to work with local and federal agencies to track cases and determine the sources of infection.