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Food Safety Focus (222nd Issue, January 2025) – Article 3

E. coli O157:H7 Outbreak in the USA Linked to Slivered Onions

A large outbreak of E. coli O157:H7 started in September 2024 in the United States, where 104 people were infected, 1 died and 4 developed haemolytic uraemic syndrome (HUS). Investigations suggested that contaminated fresh slivered onion used by a fast food chain were the likely cause. Being prudent, the Centre for Food Safety has stepped up surveillance and collected samples of burgers with onion from local fast food shops for testing. No E. coli O157 was detected.

E. coli is a type of bacteria that normally lives in the intestines of humans and mammals. It can be found in raw vegetables and undercooked meat products. It is transmitted through faecal contamination of foods and water, as well as cross-contamination, or by direct human contact during food preparation. A potent toxin produced by the pathogenic strain E. coli O157:H7 can result in HUS, a potentially fatal kidney disease. The young and the elderly are especially vulnerable. To prevent E. coli O157:H7 contaminations, practice Five keys to Food Safety and maintain good personal and kitchen hygiene. Keep cooked and raw food separate. Wash fruits and vegetables thoroughly and cook meat thoroughly before consumption.