A food poisoning outbreak affecting 50 individuals has been traced to a common strain of E. coli, with raw onions identified as a likely source.

A worrying food poisoning outbreak connected to McDonald’s iconic Quarter Pounders has emerged, with one fatality reported and nearly 50 people affected across ten states. The outbreak, linked to the notorious E. coli O157

strain, poses a serious health risk, particularly to vulnerable groups such as young children, the elderly, and individuals with compromised immune systems.

According to the Centers for Disease Control and Prevention (CDC), the affected individuals, ranging in age from 13 to 88, have exhibited symptoms consistent with E. coli infection. This bacterial strain is known for causing severe gastrointestinal distress, including bloody diarrhoea, fever, and vomiting, which can lead to dehydration and potentially life-threatening complications such as kidney failure.

Initial investigations suggest that the source of contamination may be raw slivered onions, which are commonly used as a topping on popular burgers. While health officials initially considered both the beef patties and onions as potential sources, the beef is deemed less likely due to stringent federal regulations that mandate thorough testing and cooking procedures designed to eliminate harmful bacteria. In contrast, the onions, served raw, are more susceptible to contamination during handling and preparation.

As the outbreak continues to unfold, McDonald’s has faced mounting pressure to reassure customers. President Joe Erlinger appeared on the Today show to address concerns, emphasising the company’s commitment to food safety and the rigorous standards in place to protect consumers. He reiterated that the health and safety of customers is a top priority for the fast-food giant.

Symptoms of E. coli infection typically present within one to two days following exposure and can escalate quickly, necessitating immediate medical attention, especially for young children. Health experts advise that anyone experiencing severe symptoms, particularly bloody diarrhoea or signs of dehydration—such as reduced urination, increased thirst, or dizziness—should seek medical help without delay.

The CDC is actively working alongside state health departments to investigate the outbreak further and trace the exact origins of the contaminated produce. They are urging anyone who has consumed McDonald’s Quarter Pounders and is experiencing symptoms to report their illness, aiding in the investigation and prevention of further cases.

As the situation develops, this incident serves as a stark reminder of the potential dangers associated with foodborne pathogens. E. coli, while commonly found in the environment, can turn deadly when ingested in harmful quantities. Consumers are advised to remain vigilant about food safety practices, especially when dining out.

McDonald’s is currently working to address the situation, including potentially recalling affected products and reviewing their food safety protocols to ensure this type of outbreak does not happen again. The incident raises questions about the effectiveness of current food safety measures in the fast-food industry, particularly as consumer demand for convenience and speed continues to rise.

The investigation remains ongoing, with health officials committed to providing updates as more information becomes available. In the meantime, the company is reaching out to customers to reassure them of their commitment to safety and quality.