How do onions get salmonella?
Andrew Mclaughlin
Updated on January 19, 2026
Onions can become contaminated at any point in the food supply chain — while growing in the fields, during processing or distribution, or when they're being prepared in a restaurant or home. Last year, a salmonella outbreak from contaminated red onions caused more than 1,000 infections.
How do you prevent salmonella from onions?
If you have recalled onions, do not eat them.
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Always follow these four food safety steps to prevent getting sick from Salmonella:
- Clean: Wash your hands, utensils, and surfaces often.
- Separate: Keep food that won't be cooked separate from raw meat, poultry, and seafood.