Infections from anisakidosis, a parasite found in sushi, are on the rise, says a new study in the journal BMJ Case Reports. It highlighted the story of a 32-year-old man from Portugal who had severe stomach pain, vomiting, and a weeklong fever. It was traced to a parasite known as anisakis, which he’d picked up from eating sushi.
Anisakidosis — formerly known as anisakiasis or anisakiosis, and also called herring worm disease — is a parasitic infection. It is caused by eating raw or undercooked fish or seafood infected with small anisakis worms.
In rare cases, it can be fatal. Most reported cases have been in Japan, where eating raw fish is common, but it is increasingly being seen in Western countries, the study says.
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