Bailee Henderson

Between 2017 and 2019, Canadian public health laboratories transitioned to whole genome sequencing (WGS) for foodborne illness outbreak surveillance. A recent study shows the positive impact of this transition of national outbreak detection and response for important foodborne pathogens. 

Although the U.S. Food and Drug Administration (FDA) was investigating a grower of interest in Washington state, the agency has been unable to definitively implicate a grower in the Escherichia coli outbreak linked to onions supplied by Taylor Farms and served at McDonald’s.

A recent study of ground beef-related Salmonella outbreaks found higher levels of infection among more socioeconomically vulnerable individuals.

In the debut installment of the Food Safety Five Newsreel, we discuss an ongoing multistate outbreak of Escherichia coli infections linked to onions served at McDonald’s restaurants. The episode also takes a look at legislation passed in California that marks the country’s first mandatory food date labeling reforms.

In an October 31 webinar, Jim Jones, U.S. Food and Drug Administration (FDA) Deputy Commissioner for Human Foods, provided insight into the work of the Human Foods Program and how budgetary constraints are affecting its work.

The U.S. Centers for Disease Control and Prevention (CDC) has officially named Taylor Farms onions served at McDonald’s as the source of the recent Escherichia coli outbreak, and has reported 90 illnesses, 27 hospitalizations, two cases of Hemolytic Uremic Syndrome, and one fatality.

The U.S. Food and Drug Administration’s (FDA’s) Human Foods Program has published a list of priority work it intends to deliver upon in Fiscal Year 2025, spanning microbiological food safety, food chemical safety, and nutrition.

Testing has shown no sign of Escherichia coli contamination in McDonald’s Quarter Pounder beef patties, and traceback and epidemiological data have ruled out beef as the cause of the ongoing E. coli outbreak. Quarter Pounders have returned to the menu at affected McDonald’s locations—without slivered onions.

Amid the ongoing E. coli outbreak, Taylor Farms has been confirmed as the onion supplier to the affected McDonald’s locations. As a result, national restaurant chains are proactively pulling onions from their menus. FDA is still investigating whether onions are the vehicle of illness.

A foodborne illness outbreak linked to McDonald’s Quarter Pounders contaminated with Escherichia coli has caused 49 illnesses, ten hospitalizations, and one death in ten states. Slivered onions used on the sandwiches are the probable vehicle of illness.