Understanding the human body is a team effort. That's where the Yachtel group comes in.

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When it comes to a guide for your gut, count on YacL.

This is Scientific Americans 60 Second Science.

I'm Waite Gibbs.

I'm a big fan of sushi and saviche, so I was alarmed to see the headline on a recent news release from the University of Washington,

stating that sushi parasites have increased 283-fold in the past 40 years.

But after digging into the research, which came out of a marine ecology lab run by Chelsea Wood at UW Seattle campus, I learned that the rising abundance of

marine worms known as Anasakids is actually less of a problem for people than it is for whales and

dolphins, which are the natural hosts infected by those parasites.

Woods team did what's known as a meta-analysis. They collected data from 123 papers published

over the past half century that estimated parasite abundance in various species at sites all over

the world between 1967 and 2017. Their analysis, published last month in the journal Global Change Biology, found that

since 1978, when less than one worm was seen in every 100 host animals on average, the

prevalence of Anasakid parasite infection has skyrocketed, to the point that more than one worm is now

typically seen in every host animal examined in 2015.

Anasakid worms grow in the guts of whales, spread to krill through the whale's poop,

and then move up the food chain to squid and small fish like anchovies, then to big fish,

like salmon, tuna, and halibut, and finally to humans.

...