Swallowing a live garden slug led to a serious parasitic infection for an Australian teen.
They’re small, sneaky, and likely to make you sick. From viruses, to bacteria, to pesky protozoa, here are the latest findings on the parasites that live among (and on, and in) the creatures of the Earth.
A surprising number of dogs working for the U.S. Department of Homeland Security are infected with this parasite, according to a new study.
Fossil fly pupae contain evidence of a fascinating —and deadly — story of insect parasitism in the ancient world.
A striking painting called "The Host" is based on the artist's personal experience with a parasitic worm that he discovered in his eye.
A Tennessee teen's summer trip to Florida turned nightmarish after he contracted hookworms from playing in sand at the beach.
When a woman in Russia noticed a small lump under her left eye, she snapped a selfie. Then, the lump moved.
It's a Russian nesting doll of sorts: Parasitic bugs that live in the human gut have their own set of gut bugs inside their intestines.
An Australian teenager who ate a garden slug on a dare was infected by a parasite that caused a debilitating brain disease, leaving him paralyzed from the neck down.
A strange plant that needs no sunlight and sucks on underground fungi for nutrients has turned up in Borneo, Malaysia, 151 years after the last time a scientist found it.
A 26-year-old woman in Oregon made a horrifying discovery: Her eyes were infected with small, translucent eye worms.