Diphyllobothrium latum and related species (the fish or broad tapeworm) are the largest known tapeworms that can infect people, can grow up to 35 feet long.

In the latest installment of the Parasites 101 series on the podcast, Parasitology teacher and author of Parasites: Tales of Humanity's Most Unwelcome Guests, Rosemary Drisdelle joined me to talk about Diphyllobothrium latum.