Two drugs veterinarians use to fight parasites on pets may be effective way to control bed bugs on chicken farms, a new study shows.

Vikings used the latrine about 2,500 years ago and their feces now offer researchers a chance to better understand a parasite, Trichuris trichiura.

Hanging out with other guppies can offer protection against predators, but all that social mingling can set them up for breeding deadly parasites.

The shape of flowers has the biggest effect on how bumblebees acquire parasites, a study shows. The findings could influence what pollinator-lovers plant.

Scientists have uncovered an entire network of gastrointestinal parasite sharing among 17 wild and domestic herbivore species.

A world with more sublethal parasitic infections is a greener world. New research clarifies how that relationship works.

Tiny marine worm larvae have a survival secret: they turn into carnivores, devouring microscopic crustaceans and other prey living in plankton.

A debilitating parasite is invading the guts of monarch butterflies, researchers say. "It's a signal that something is not right in the environment."

Watering holes in Africa quench the thirst of animals during dry seasons, but they're also hotspots for parasites that infect the animals.

WHO's approval of the first-ever malaria vaccine could prevent hundreds of millions of cases of malaria and thousands of deaths in children each year.