Research suggests that parasitic worms are becoming more common. A 2020 study found that the number of Anisakis worms in raw or undercooked seafood has increased over 280 times in the past 40 years.

Anisakis is a parasite found in raw or undercooked fish and shellfish. It is a nematode, that is, a worm that can be ...

This can lead to anisakiasis, a form of parasitic disease. Eventually, the parasite dies and produces an inflamed mass. Signs and symptoms of anisakiasis include abdominal pain, nausea ...