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Sunlit53 t1_itrenwt wrote

If you are referring to sushi it’s necessary to freeze it to a certain temperature and keep it there for a while to kill off any parasites.

“Sushi-grade- Freezing and storing seafood at-20°C (-4°F) or below for 7 days (total time), or freezing at-35°C (-31°F) or below until solid and storing at -35°C (-31°F) or below for 15 hours, or freezing at -35°C (-31°F) or below until solid and storing at -20°C (-4°F) or below for 24 hours.

https://www.gov.mb.ca › docsPDF Food Safety Guidelines for the Preparation of Sushi”

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BaldBear_13 t1_itrfrni wrote

you are quite right. Fish is often farmed, so disease is a risk.

Beef intended for raw consumption is also often sterilized by freezing.

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