U.S. Cyclospora outbreak linked to lettuce under investigation
U.S. health officials are investigating a multi-state outbreak of Cyclospora, a parasite that can contaminate food through water or surfaces exposed to human waste.
The infection, known as cyclosporiasis, can cause diarrhea, stomach cramps, nausea and dehydration. Symptoms usually appear about a week after exposure and the illness typically does not spread between people.
As of July 20, more than 30 U.S. states had reported cases, with about 100 hospitalizations and no deaths. Officials say the true number of infections may be higher because some people recover without seeking medical care.
Canadian health officials say they are not investigating any Cyclospora outbreaks in Canada. Previous Canadian cases have mostly been linked to travel or imported produce, including items such as basil, cilantro, berries, lettuce and salad mixes.
Outbreak timeline
May 13, 2026: First illnesses linked to the outbreak were reported in the U.S.
June 30: Michigan reported more than 170 cases, well above its usual yearly average.
July 16: The FDA and CDC began investigating illnesses linked to shredded iceberg lettuce served at Taco Bell locations in several states. Investigators traced the lettuce to a supplier in Mexico.
July 17-18: Taylor Farms de Mexico voluntarily removed iceberg lettuce from central Mexico from the U.S. market. Some lettuce products sold under the Marketside brand were also recalled.
July 20: FDA officials said evidence continued to support the recall and investigation. Canadian officials confirmed there is still no Cyclospora outbreak under investigation in Canada.
