Cross-Contamination Factor in Outbreak

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This Food Safety Infosheet covers an outbreak of salmonella in 2012 that was linked to unpasteurized tempeh. Tempeh is a fermented soy product and should be handled like raw meat.


  • Unless noted on packaging, treat tempeh as a raw food.
  • Knives, cutting boards and other food contact surfaces must be cleaned and sanitized between preparation and use with ready-to-eat foods.
  • Salmonella and other pathogens can grow during the tempeh production process.
  • Wash hands after handling any potentially contaminated food or packaging (especially those that are leaking).

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