Three types of parasites can cause disease in humans. They are protozoa, carried by mosquitos, helminths, such as roundworm, and ectoparasites, for instance lice and bed bugs. Parasites are organisms ...

Scientists have found over a dozen parasitic worms in the eyes of a black bear, renewing fears that humans could face an emerging danger from the tiny worms that can cause blindness. The black bear ...

Hoards of flesh-eating worms have erupted from the ground in Texas, terrifying local residents. The invasive hammerhead worms — which can grow up to a foot long — came to the surface in the ...