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Anisakis is a genus of parasitic nematodes, which have a life cycle involving fish and marine mammals. They are infective to humans and cause anisakiasis....
Anisakiasis is a human parasitic infection of the gastrointestinal tract caused by the consumption of raw or undercooked seafood containing larvae of the nematode Anisakis simplex....
Fewer than ten cases occur annually in the United States....
Anisakiasis can be easily prevented by adequate cooking at temperatures greater than 60°C or freezing. The FDA recommends all shellfish and fish intended for raw consumption be blast frozen to -35°C or below for fifteen hours or be regularly frozen to -20°C or below for seven days....
Many countries require all types of fish with potential risk intended for raw consumption to be previously frozen to kill parasites....
For the worm, humans are a dead-end host. Anisakis and Pseudoterranova larvae cannot survive in humans, and will eventually die. In some cases, the infection will resolve with only symptomatic treatment. In other cases, however, infection can lead to small bowel obstruction, which may require surgery....