The popularity of such raw fish dishes makes it important for consumers to be aware of this risk.
Parasitic infections from freshwater fish are a serious problem in some parts of the world, particularly Southeast Asia.
A study in Seattle, Washington showed that 100% of wild salmon had roundworm larvae capable of infecting people.
Infection risk of anisakis is particularly higher in fishes which may live in a river such as salmon (sake) in Salmonidae or mackerel (saba).
Such parasite infections can generally be avoided by boiling, burning, preserving in salt or vinegar, or freezing overnight.