Federal health officials have linked four more states to an outbreak of a diarrhea-causing parasite. The update announced Friday expands the scope of the largest U.S. outbreak of cyclospora on record. Federal health agencies have been investigating the outbreak tied to shredded lettuce served at Taco Bell restaurants. Their tracing efforts now include Illinois, Kansas, Oklahoma, and Pennsylvania. Previously the agency’s investigation included five states: Indiana, Kentucky, Michigan, Ohio and West Virginia. Investigators are focused on produce supplier Taylor Farms and imports of lettuce from a location in Mexico.

Federal health officials have remained focused on lettuce from Taylor Farms as the source of a multistate outbreak despite inaccurate test results reported over the weekend. Food and Drug Administration officials on Monday briefed reporters on how the government erroneously reported a direct link between a sample of lettuce from Taylor Farms and the parasite that causes severe diarrhea. Officials said the false positive result came from a rapid, molecular test used to screen incoming lettuce from Mexico at the border. While the FDA reported the link Saturday, officials said a subsequent quality check found the result was a false positive.

California is making food labels less confusing by banning "sell by" dates. The new law starting Wednesday requires manufacturers to use just two labels: "Best if Used By" for peak quality and "Use By" for safety. This change aims to reduce food waste and emissions. California is the first state to standardize labels, with New York following suit. Other states are considering similar laws. The confusion over labels has led to significant food waste, with nearly 20% of food wasted due to unclear labeling. Advocates believe this simple change can make a big impact.

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A Best If Used By date is stamped above a Sell By label on a milk carton, Tuesday, June 30, 2026, in San Francisco. (AP Photo/Jeff Chiu)

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A date is stamped below a Sell By label on a carton of eggs displayed at Park Plaza Fine Foods, Tuesday, June 30, 2026, in San Francisco. (AP Photo/Jeff Chiu)