The notorious disease known as sleeping sickness can lurk inside a host for months or even years before serious symptoms ...

Entamoeba histolytica infects nearly 50 million people each year and kills around 70,000. It’s a shape-shifting parasite that invades the human gut, often causing mild symptoms like diarrhea. But in ...

Male fertility rates have been plummeting over the past half-century. An analysis from 1992 noted a steady decrease in sperm counts and quality since the 1940s. A more recent study found that male ...

A stealthy parasite behind deadly sleeping sickness has been caught using an astonishing trick to evade the human immune system. Credit: Shutterstock A deadly parasite stays hidden by shredding its ...

Add Yahoo as a preferred source to see more of our stories on Google. A human case of the flesh-eating New World Screwworm has been found in the United States, carried by a person who recently visited ...

Here’s a comforting thought: you might not actually be alone in your own body right now. Parasites are far more common than most people realize, and they don’t care about your personal boundaries, ...

When most travelers pack their bags for a trip, they're focused on sightseeing, food, and making memories – not the possibility of returning home with a rare illness. Unfortunately for some, ...

Head lice, fleas and tapeworms have been humanity’s companions throughout our evolutionary history. Yet, the greatest parasite of the modern age is no blood-sucking invertebrate. It is sleek, ...