health
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E. coli Infections Possibly Linked to McDonald's Quarter Pounders Reported in Mountain West
National Desk
April 23, 2026
Health officials are investigating a cluster of E. coli infections potentially connected to McDonald's Quarter Pounder sandwiches served in the Mountain West region of the United States. The Centers for Disease Control and Prevention (CDC) released a food safety alert regarding the outbreak.
The CDC is working to determine the specific source of the E. coli contamination. The affected area includes multiple states in the Mountain West. Investigations are ongoing to identify the precise food item or ingredient responsible for the illnesses.
McDonald's has taken precautionary measures in response to the potential link. According to the CDC alert and statements from the company, certain ingredients used in Quarter Pounders at restaurants in the affected region have been temporarily removed from supply chains. This action is intended to mitigate further risk while the source of the contamination is identified.
Symptoms of E. coli infection typically include severe stomach cramps, diarrhea (often bloody), and vomiting. Symptoms generally appear three to four days after exposure. Most people recover within five to seven days, but some infections can be severe or even life-threatening. Individuals experiencing these symptoms in the affected region, particularly those who have recently consumed Quarter Pounder sandwiches from McDonald's, are advised to seek medical attention.
The CDC has provided information and updates on the outbreak on its website.


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