Overview
- Michigan remains the epicenter with about 9,680 confirmed cyclosporiasis cases reported by state health officials on Tuesday, July 28, and roughly 160 hospitalizations linked to the surge.
- Federal and state probes used patient interviews and supply‑chain tracebacks to link one major cluster to shredded iceberg lettuce supplied from central Mexico by Taylor Farms de Mexico, prompting the company’s July 17 voluntary recall and product removals by some restaurants and retailers.
- The Food and Drug Administration has said a previously reported positive test of a lettuce sample was a false positive and no product sample has yielded a confirmed Cyclospora-positive test, leaving epidemiology and traceback as the primary evidence tying cases to the supplier.
- Investigations remain active and incomplete with other simultaneous clusters under review; officials are probing parsley, cilantro and additional produce while reporting lags and lab backlogs slow case confirmation and attribution.
- Public reaction and guidance have shifted behavior and retail activity: surveys show many Americans cutting back on fresh produce purchases, health agencies advise discarding recalled lettuce, washing produce under running water, and cooking greens when possible to lower risk.