Parasites need a host to survive and spread. There are three main types, and their symptoms vary. Stay away from others if you have a parasite to prevent the spread.

Parasitic Diseases A–Z Index: More information about specific parasites. A parasite is an organism (a living thing) that lives on or inside another organism. Information for health professionals, women, …

A fish parasite, the isopod Cymothoa exigua, replacing the tongue of a Lithognathus Parasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the …

Aug 18, 2025 · We asked experts how parasites are transmitted, what it feels like to be infected, and what you can do to protect yourself.

Oct 14, 2025 · Millions of Americans are affected by parasites. From protozoa to roundworms, tapeworms to flukes, there are four main classifications of parasites that infect humans.

Jun 24, 2025 · WebMD gives you the facts about common parasites and their diseases. Learn about lice, bedbugs, hookworms, ringworms, scabies, and more.

Nov 24, 2025 · Parasites live in other host organisms and depend on them for survival. Parasites can spread diseases and cause parasitic infections. The symptoms of a parasite infection in humans can …

Nov 17, 2025 · Which Parasites Can Affect Humans? Three main types of parasites infect humans: protozoa, helminths, and ectoparasites. Each has a unique way of spreading, multiplying, and …

Parasitic infections are any illnesses or conditions caused by parasites living and reproducing in your body. Parasites are organisms that need another living thing (a host) to get the nutrients they need to …

3 days ago · Parasites are essential regulators. Explore their fundamental roles in maintaining biodiversity, shaping the human immune system, and developing future medicine.