A multistate outbreak of cyclosporiasis continues to spread across the United States, with health officials expanding the investigation to 15 states. As additional infections are identified, authorities are tracing the source of the outbreak and advising consumers to avoid recalled iceberg lettuce that may be linked to the illnesses.

As of July 28, the United States had reported 6,707 laboratory-confirmed cases, while another 11,500 suspected infections were awaiting confirmation. Since May, cases have been reported in 45 states, with Michigan and Ohio recording the highest numbers. Michigan has also reported the first deaths associated with the current outbreak.

Cyclosporiasis is a foodborne illness caused by the parasite Cyclospora cayetanensis. It is typically spread through contaminated food or water and can cause diarrhea, stomach cramps, nausea, vomiting, bloating, fatigue, loss of appetite and low-grade fever. Symptoms generally appear about one week after exposure and may persist for several weeks without proper treatment.

Investigators have linked one of the outbreak clusters to iceberg lettuce produced by Taylor Farms de Mexico. The company has voluntarily recalled affected products distributed to restaurants and retail stores across multiple states. Health officials continue to advise consumers not to eat the recalled lettuce and to seek medical care if symptoms develop.