The number of suspected cases of a parasitic infection causing severe gastrointestinal distress has reportedly tripled in a matter of days, with health officials actively investigating the unknown source.
The Centers for Disease Control and Prevention (CDC) has identified 145 Americans in 17 states who have contracted the cyclospora parasite. Twenty individuals have required hospitalization.
However, state health officials in Michigan have reported over 300 cases within the state alone, a number that has rapidly increased since the first case was identified on June 22. Michigan typically sees around 50 cases of cyclosporiasis per year. More than a dozen Michigan residents have been hospitalized with the infection.
Officials suspect a foodborne source for the current outbreak, as patients have not reported recent travel. Cyclosporiasis is acquired by consuming food or beverages contaminated with the parasite, which is often found in feces. Symptoms typically appear about a week after exposure and include diarrhea, severe cramping, nausea, vomiting, and fatigue. The illness can last for more than a month, with symptoms potentially recurring.
"The investigation continues," stated the Michigan Department of Health and Human Services (MDHHS) in response to the surge. The department is coordinating with local health departments and the CDC to identify a common exposure and potential sources.
The CDC is investigating several clusters of cases across multiple states. As of July 1, New York had the highest number of reported cases, ranging between 31 and 80. Texas and Illinois follow with 11 to 30 cases each. The remaining 14 states have reported between one and ten cases.
Previous outbreaks of cyclosporiasis have been linked to produce such as bagged salad kits, cilantro, and basil, though no specific food item has been identified as the source in this instance.
Cyclosporiasis infections tend to increase between May and August. While human-to-human transmission is rare, the CDC recommends avoiding food and water at risk of fecal contamination and adhering to general food safety practices to prevent infection. Treatment often involves a course of antibiotics, though individuals with healthy immune systems may recover without medical intervention.
Separately, an additional 45 cases of cyclosporiasis have been reported in individuals who became ill after consuming food or beverages outside the U.S. These cases range in age from 17 to 89, with three hospitalizations and no reported deaths.
Individuals concerned about gastrointestinal illness are advised to contact a healthcare provider. Adequate hydration is also recommended, especially during periods of high temperatures.