Cyclospora Outbreak in Michigan Leads to Two Deaths
Public health officials reported on Monday that two individuals in Michigan have passed away due to a multi-state outbreak of cyclosporiasis. This marks the first fatalities associated with the current increase in cases of this parasitic intestinal infection.
The Michigan Department of Health and Human Services (MDHHS) noted that both patients had significant preexisting health issues which may have exacerbated the effects of the infection, leading to severe dehydration.
State authorities chose not to disclose further demographic information for privacy reasons but underscored that cyclosporiasis is generally not fatal, with such deaths being rare in the U.S.
Michigan is currently experiencing the highest number of cases, with health officials reporting 11,234 infections and 193 hospitalizations as of August 3, stemming from an investigation that began in late June.
A significant portion of the reported cases falls within the 30 to 39 age range, accounting for over 2,200 incidences; however, infections have been seen across various age demographics.
As Cyclospora cases tend to rise during late spring and summer—likely due to warmer weather and the increased consumption of fresh produce—federal health officials are anticipating that the number of cases will continue to climb through late August.
This multi-state outbreak has been mainly linked to contaminated shredded iceberg lettuce from central Mexico, supplied by Taylor Farms de Mexico. The contaminated products were distributed to major supply chains, including several Taco Bell locations and retail grocery stores.
Initial False Positive Testing
Earlier in the investigation, the U.S. Food & Drug Administration (FDA) indicated that an initial PCR test on the lettuce from Taylor Farms returned a false positive, attributed to the complexities of detecting Cyclospora DNA.
In response, Taylor Farms voluntarily recalled iceberg lettuce sourced from central Mexico on July 17, with restaurant chains and distributors also removing the affected products from their supply chains around that same period.
Testing by Mexican Authorities
Subsequent testing by health agencies in Mexico on both lettuce and water samples from Taylor Farms came back negative or inconclusive for Cyclospora.
Continuing the Investigation
Despite the negative tests, the CDC and FDA maintained a connection to the outbreak through epidemiological traceback. All clusters of illness related to this multi-state surge were linked back to the supply chain from Taylor Farms de Mexico.
Food safety regulators from the FDA and the CDC are still looking into whether there might be other contaminated produce contributing to the illnesses beyond the lettuce in question.
Cyclosporiasis is caused by the microscopic parasite Cyclospora cayetanensis, which spreads through consumption of food or water tainted with human fecal matter. After ingestion, symptoms such as watery diarrhea, abdominal cramps, and fatigue can appear about a week later and may last from several days to over a month if untreated. Health agencies recommend that anyone suffering from prolonged diarrhea or dehydration after eating fresh produce seek medical help promptly.
