美國政府網站說明0 °F（-17.78 °C)是可以殺蟲，但要在穩定溫度一段時間下才能殺到蟲。家用冰櫃會常開關較難保持在穩定溫度。
Trichina and other parasites can be destroyed by sub-zero freezing temperatures. However, very strict government-supervised conditions must be met. Home freezing cannot be relied upon to destroy trichina. Thorough cooking, however, will destroy all parasites.
Adequately freezing or cooking fish will kill the parasite.
I recommend you deep-freeze salmon and all types of anadromous fish (fish that swim upstream to spawn) for at least 7 days if you plan to feed it raw, or cook it before feeding it to your pet.
The important thing to remember about Trichinella is this: if you freeze pork for three weeks prior to feeding it, all will be well.
So to avoid toxoplasmosis, freeze meat for 24 hours prior to feeding.
deep-freeze salmon for at least seven days if you’re going to feed it raw, or cook it before feeding it to your pet.