Medical

Unsafe parasite showing up in sushi and raw fish

Unsafe parasite showing up in sushi and raw fish

The doctors only began to suspect he might have anisakiasis (a parasitic disease) after they asked him if he had eaten sushi recently.

A new report from the British Medical Journal Case Reports said that there is a high chance consumers are ingesting parasites from raw and undercooked fish. Most of the cases were described in Japan due to food habits, but the report said it has become prevalent in Western countries.

A week later he was in the hospital, with an upper gastrointestinal endoscopy performed to reveal a parasitic worm penetrating his stomach.

He said he's found the worms while preparing meals of fish purchased in the supermarket.

"It's easy to treat with an antiparasitic to kill the parasite", says Chattoo. "Also, some people experience vomiting as a symptom and this can often expel the worm from the body", the website reads.




The condition, anisakiasis, results from a contamination by parasites. The best ways prevent it is to avoid eating raw or undercooked fish or squid.

Health Canada says it "does not routinely collect" data on illnesses tied to raw seafood consumption, but it estimates that 18 per cent of all foodborne illnesses in the country are tied to seafood.

The Food and Drug Administration recommends freezing fish for several days, or cooking to at least 145 degrees Fahrenheit. In such cases, it is possible to cough up the worm or remove it by hand.

Some people, though, will never give up eating their beloved sushi or other raw fish delights. "They are grossly visible in the fish".


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