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 …

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

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 …

Jun 13, 2025 · Because parasites interact with other species, they can readily act as vectors of pathogens, causing disease. There are three main classes of parasites that can cause disease in …

Nov 18, 2025 · Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact.