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  1. Parasitism - Wikipedia

    Parasitism is a kind of symbiosis, a close and persistent long-term biological interaction between a parasite and its host. Unlike saprotrophs, parasites feed on living hosts, though some parasitic fungi, …

  2. Parasitic Infection: Causes, Symptoms & Treatment

    Parasitic infections are diseases caused by organisms that live off of another living thing. They can cause fever, fatigue, intestinal symptoms, skin rashes or neurological symptoms.

  3. 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 can be free-living …

  4. PARASITIC Definition & Meaning - Merriam-Webster

    The meaning of PARASITIC is of, relating to, or being a parasite. How to use parasitic in a sentence.

  5. PARASITIC Definition & Meaning | Dictionary.com

    PARASITIC definition: of, relating to, or characteristic of parasites. See examples of parasitic used in a sentence.

  6. PARASITIC | definition in the Cambridge English Dictionary

    Bees are under attack from two different parasitic mites. Parasitic wasps, flies and spiders are natural enemies of the larvae. The fast metabolism of young fish makes them more vulnerable to fatal …

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

    parasitic disease, in humans, any illness that is caused by a parasite, an organism that lives in or on another organism (known as the host). Parasites typically benefit from such relationships, often at …

  8. Parasitic - Definition, Meaning & Synonyms | Vocabulary.com

    The adjective parasitic is mainly a scientific term for talking about an organism that lives on a host, taking what it needs to stay alive while often injuring the host. By their nature, ticks, leeches, and lice …

  9. Overview of Parasitic Infections - MSD Manuals

    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 …

  10. Parasitic Diseases - MedlinePlus

    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. Some …