Parasitic worms live in and feed off living hosts, such as humans. Learn about transmission, treatment, how to avoid being a host, and more.

Types of human parasites and parasitic infections. There are three types of parasite that can live in or on the human body, including worms, lice, and single-cell organisms. Learn more here. READ MORE ...

Most types of worms that infect humans only cause mild symptoms, but it’s still important to contact a doctor if you suspect a worm infection so you can get treated early.

A shocking new study shows that 90% of freshwater fish in Southern California may be carrying parasites that can infect ...

Even after 20 million years of evolutionary separation, two tiny worm species show astonishingly similar patterns in how they ...

Invasive hammerhead worms are spreading in Texas, and have been spotted in Houston, Dallas, Austin and toward the coast.

Five species of invasive hammerhead worms — four in the genus Bipalium and one in Diversibipalium — are established in North America, said Bruce Snyder, an associate professor of biology at ...