There are more parasites than any other organism on Earth—which is one of the reasons Emmitt Jolly finds the common but misunderstood creatures so fascinating. “That is the most successful form of ...

Parasites are organisms that survive by feeding on humans and other hosts, often causing mild to severe health problems. They can enter the body in multiple ways, including consuming contaminated food ...

Intestinal worms often lead to gastrointestinal symptoms, like diarrhea, because they live in your digestive tract. Other symptoms, such as a skin rash or problems breathing, also can occur, depending ...