STEC O157:H7 — slivered onions (McDonald's Quarter Pounders, 2024)
First reported: 2024-09-26 · Data as of: 2024-12-19
clear
Buyer guidance for slivered onions from Taylor Farms processing facility, CO
What to do
- Outbreak is closed.
- If you froze Taylor Farms-supplied slivered onions from October 2024, discard them.
What we don't know yet: Whether the contamination source was upstream onion growers or the Taylor Farms processing facility.
Summary
Multi-state outbreak of E. coli O157:H7 infections linked to slivered onions supplied to McDonald's restaurants via Taylor Farms. Initial hypothesis focused on the Quarter Pounder beef patties; traceback investigation redirected to a single onion processing facility. One death reported in Colorado.
Traceback chain
FDA traceback investigation. Honest gap nodes indicate steps where the public investigation has not yet disclosed operator names.
farm
Multiple onion growers (TX, CA, ID)
multi-state
processor
Taylor Farms (Colorado)
Salinas, CA facility
◼ 1 batch
distributor
McDonald's distribution network
national
◼ 1 batch
retailer
McDonald's restaurants (14 states)
national
◼ 1 batch
Known gaps: individual farm-level contamination not yet disclosed