The Centers for Disease Control and Prevention has confirmed a cyclosporiasis outbreak affecting 32 U.S. states [1].

The spread of this parasite poses a significant public health risk because it causes severe gastrointestinal distress and is linked to common food sources. Because the contamination is widespread, officials are working to identify the specific produce responsible for the infections.

Cyclosporiasis is caused by the Cyclospora parasite, which typically leads to explosive, watery diarrhea. Health officials have confirmed cases in 32 states [1], with the highest concentrations of infections appearing in California, Michigan, and Louisiana [2]. In Louisiana, officials have reported 23 cases [4].

Michigan has seen the most significant impact of the outbreak. Reports on the total number of infections in the state vary, with estimates ranging from 1,251 [3] to 1,562 confirmed cases [2].

"Michigan has now surpassed 1,562 confirmed cases of the parasite," the Michigan Department of Health said [2].

Investigators believe the outbreak is tied to contaminated food or water [5]. Specifically, health officials have pointed toward bagged salads as a likely vector for the parasite [5]. The CDC is currently urging the public to exercise caution with these products while the investigation continues.

"The CDC says the outbreak is tied to contaminated produce, and officials are urging the public to avoid certain bagged salads until a recall is issued," a CDC spokesperson said [5].

Public health agencies continue to monitor new cases as they emerge this month. They are coordinating with food suppliers to trace the origin of the contaminated produce to prevent further infections across the country.

“Health officials have confirmed cyclosporiasis cases in 32 states”

The scale of this outbreak suggests a systemic failure in the supply chain of pre-packaged produce. Because the parasite is spread across 32 states, the contamination likely occurred at a centralized processing or distribution point rather than a single farm. This highlights the vulnerability of the U.S. food system to large-scale parasitic outbreaks when relying on widely distributed bagged salads.