[sammyg2]

Originally Posted by scottmandue

How do they know the origin of the tapeworm was salmon sushi?

Many people return from third world countries with tapeworms, I doubt they were eating sushi.

Banh and the patient were initially confounded over how the tapeworm ended up in the man's body. He reported no trips abroad and couldn't recall drinking any questionable water. But then the man confessed his deep love of salmon sashimi. "I eat raw salmon almost everyday," he admitted to Bahn.

A 2017 study published by the U.S. Centers for Disease Control and Prevention found that wild salmon caught in Alaska could be infected with Japanese broad tapeworm — a parasite previously believed to only infect fish in Asia. And the CDC warned, "The risk of becoming infected with the Japanese tapeworm parasite is most prevalent when consuming raw or undercooked fish, particularly in dishes such as sushi, sashimi and ceviche." The CDC says the parasite and the larvae that are buried deep in salmon muscle can be destroyed when fish is adequately cooked or frozen.

https://www.npr.org/sections/thetwo-way/2018/01/19/579130873/man-pulls-5-1-2-foot-long-tapeworm-out-of-his-body-blames-sushi-habit