2023 Calgary E. coli outbreak

2023 outbreak of E. coli in Calgary, Alberta, Canada

The 2023 Calgary E. coli outbreak was a significant public health incident that occurred in Calgary, Alberta, Canada, beginning in late August 2023. The outbreak was linked to several daycare centers and affected hundreds of children and adults, leading to widespread concern and a comprehensive public health response.

Background

Escherichia coli (E. coli) is a bacterium commonly found in the intestines of humans and animals. While most strains are harmless, some can cause severe foodborne illness. The strain involved in the Calgary outbreak was identified as E. coli O157:H7, a particularly virulent strain known for causing severe gastrointestinal distress and complications such as hemolytic uremic syndrome (HUS).

Outbreak Details

The outbreak was first identified on August 31, 2023, when several children attending daycare centers in Calgary began exhibiting symptoms of E. coli infection, including severe diarrhea, abdominal cramps, and vomiting. Public health officials quickly traced the source of the outbreak to a central kitchen that supplied food to multiple daycare facilities.

Affected Population

The outbreak primarily affected children under the age of five, although some adults, including daycare staff and parents, were also infected. By mid-September, over 300 cases had been confirmed, with several children requiring hospitalization. A small number of cases developed into hemolytic uremic syndrome, a serious condition that can lead to kidney failure.

Public Health Response

In response to the outbreak, Alberta Health Services (AHS) launched an investigation to identify the source of contamination and prevent further spread. The central kitchen was closed, and all affected daycare centers were temporarily shut down for cleaning and disinfection. Public health officials provided guidance to parents and caregivers on recognizing symptoms and seeking medical attention.

Investigation and Findings

The investigation revealed that the outbreak was likely caused by cross-contamination in the central kitchen, where raw meat was improperly handled, leading to the contamination of ready-to-eat foods. The kitchen was found to have several violations of food safety regulations, prompting a review of food handling practices and increased inspections of similar facilities.

Impact and Reactions

The outbreak had a significant impact on the Calgary community, with many parents expressing concern over the safety of daycare facilities. The incident prompted calls for stricter food safety regulations and better oversight of food preparation in childcare settings. The Alberta government announced plans to review and strengthen food safety protocols to prevent future outbreaks.

Also see

• Escherichia coli
• Foodborne illness
• Hemolytic uremic syndrome
• Public health
• Food safety