A Fresno, Calif., man pulled a 5-and-a-half-foot long tapeworm from his body. His daily sushi habit may be the culprit.

On the "This Won't Hurt A Bit" podcast, Dr. Kenny Banh, an emergency medicine physician at UC—San Francisco's Fresno campus, told the stomach-churning story of the patient who came into his emergency department Aug. 7, 2017.

Read more:From guy's mouth, doc pulls longest tapeworm he's ever seen

Banh, on the podcast, said the man came into Community Regional Medical Center complaining of bloody diarrhea and asking to be treated for worms. Bahn was a bit skeptical until the man showed him what was in the plastic grocery bag he was holding.

It was the worm, all five-and-a-half feet of it.

"That came out of your bottom?" Banh recalled asking.

"Yes," he said.

The man described how he sat on the toilet, at first thinking his intestines were coming out of his body. So, he grabs what he thinks are entrails, pulls and takes a look.

It starts moving. A worm.

He then proceeds to pull the tapeworm out, twirling it around a toilet paper roll.

While Banh and the man tried to figure out what would have caused such a massive tapeworm, the man admitted he eats salmon sashimi, every day. It's his favorite.

In 2017, Banh recalled on the podcast, the U.S. Centers for Disease Control and Prevention found contaminated Alaskan salmon. CNN reported the fish had been infected by the Japanese broad tapeworm parasite.

Read more:Salmon with large tapeworms arrive in the U.S.

Banh said the man's raw salmon intake "almost certainly is" the reason for the tapeworm.

Banh, who often makes guest appearances on educational podcasts like "This Won't Hurt A Bit," said he couldn't tell if the worm was a week old or six months old because worms can grow at different rates.

He didn't suggest people stop eating sushi, but did issue the warning that all food has inherent risks in it, including vegetables.

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