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.

Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as …

Nov 14, 2024 · There are three main classes of parasites that can cause disease in humans: protozoa, helminths, and ectoparasites. Protozoa are microscopic, one-celled organisms that can be free-living …

Sep 3, 2025 · There are various types and subtypes of parasites. The three main classes of parasites are protozoa, helminths, and ectoparasites, which can cause disease. If you contract a parasite, you …

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 …

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.

Feb 4, 2025 · Dr. Khodadadian of Manhattan Gastroenterology explains the 10 signs that you may have a parasite and how to get treatment.

Parasites cause various diseases and are transmitted to humans most often through the ingestion of contaminated food or water or through the bite of an arthropod.

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 …

Parasites are organisms that live on or inside another organism (the host) and depend on the host for nutrients and survival. Parasitic infections are more common in areas with limited access to clean …