Researchers have provided insight into a large outbreak in Japan linked to milk served in schools.
The E. coli outbreak in June 2021 involved more than 1,800 cases from 25 schools, but no deaths were recorded.
The O antigens of most E. coli isolates were untypable (OUT). Although major foodborne toxins and pathogens were not detected, a specific E. coli strain, serotype OUT (OgGp9): H18, was isolated from milk samples related to the outbreak and tested patients. Strains from milk and patient stool samples were identified as the exact clone.
Milk cartons were part of school lunches in June 2021 in Toyama City, Japan. According to the study published in the journal Epidemiology and Infection, Pasteurized milk was produced by the T milk factory.
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