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  1. Parasites: Types, Symptoms, Treatment & Prevention

    Apr 14, 2023 · 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.

  2. About Parasites | Parasites | CDC

    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 …

  3. You Might Be Hosting a Parasite Right Now. Here’s How to Tell

    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.

  4. Pictures of Parasites: Lice, Bedbugs, Ringworms, Pinworms ...

    Jun 25, 2025 · WebMD gives you the facts about common parasites and their diseases. Learn about lice, bedbugs, hookworms, ringworms, scabies, and more.

  5. Parasites: 3 Types, Skin Symptoms, Stool Testing

    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 …

  6. Parasitic disease | Definition, Types, & Causes | Britannica

    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.

  7. Types of human parasite: Worms, infections, and causes

    Mar 2, 2022 · There are three main types of parasites that can affect humans: protozoa, helminths, and ectoparasites. These parasites can live on or in the human body and cause …