McDonald’s Linked to Deadly E. Coli Outbreak

Federal health officials are linking McDonald’s Quarter Pounder hamburgers to an outbreak of E. coli, which has sickened nearly 50 people across 10 states and resulted in one death. The Centers for Disease Control and Prevention (CDC) confirmed the outbreak on Tuesday.

Most of those affected reported eating Quarter Pounders from McDonald’s. Investigators are still working to identify the specific contaminated ingredient, according to the CDC. Initial reports point to fresh slivered onions as a potential cause.

As of now, 49 cases have been reported. The hardest-hit states are Colorado, with 26 cases, and Nebraska, with 9. Tragically, one older adult from Colorado has died from the illness. Another individual developed hemolytic uremic syndrome (HUS), a serious condition that can lead to kidney failure, though this person is not the same individual who passed away. Ten people have been hospitalized so far.

Other states affected by the outbreak include Utah, Wyoming, Iowa, Kansas, Missouri, Oregon, and Wisconsin, with four cases each reported in Utah and Wyoming.

McDonald’s has taken immediate action in response to the outbreak. Cesar Piña, McDonald’s North America Chief Supply Chain Officer, said in a statement on the company’s website, “Initial findings indicate that a subset of illnesses may be linked to slivered onions used in the Quarter Pounder, sourced by a single supplier.” The fast-food chain has since stopped using fresh slivered onions and Quarter Pounder beef patties in certain states.

The CDC clarified that Quarter Pounder patties are used exclusively in Quarter Pounders, and slivered onions are mainly served on these burgers. The illnesses began at the end of September, with the most recent case reported on October 11.

According to health officials, it typically takes three to four weeks to determine if a case is part of an outbreak. E. coli infections often cause severe stomach cramps, diarrhea, and vomiting. Most people recover within five to seven days without treatment.

However, the CDC urges anyone who has eaten a Quarter Pounder and experiences severe symptoms to contact a healthcare provider. Symptoms of serious E. coli infections include:

• Diarrhea with a fever higher than 102°F
• Bloody diarrhea
• Persistent vomiting, making it difficult to keep liquids down
• Signs of dehydration, such as infrequent urination, dry mouth, or dizziness when standing.

This outbreak raises concerns about food safety at major fast-food chains. McDonald’s, which serves nearly 25 million customers daily in the U.S., is cooperating with federal and state health officials to mitigate further risk.

The investigation is ongoing, and public health officials are expected to release more information as they continue tracing the source of contamination.