How do sushi chefs kill bacteria?

Question

I know that they do flash freezing to kill parasites. But flash freezing only kills parasites, not bacteria. How they kill salmonella and stuff?

In: Other

Answer 1

I watched a video where they said that some places will just freeze the fish at -20 (can’t remember if Celsius or Fahrenheit) tor 7 days and it will kill all the parasites. They just thaw and trim it from there. Can’t confirm this though, it was supposed to be an industry “secret”.