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  1. Giardia infection (giardiasis) - Symptoms & causes - Mayo Clinic

    Sep 20, 2025 · The parasite that causes giardia lives all over the world, mainly in areas poor sanitation and that don't have safe water. Giardia infection, also called giardiasis, is one of the most common …

  2. Giardia Infection: Causes and How It Spreads | Giardia | CDC

    Jan 24, 2024 · Giardia infections are caused by the parasite Giardia duodenalis (Giardia for short). A parasite is a type of germ that gets its food from, or at the expense of, its host. Parasites live on or in …

  3. Giardia Lamblia (Giardiasis) Causes, Symptoms, Treatment

    Giardiasis (gee-ar-die-a-sis with a soft "G") is an infection of the small intestine that is caused by the parasite, Giardia duodenalis, also known as Giardia lamblia and Giardia intestinalis.

  4. Giardiasis: What It Is, Symptoms, Treatments & Medications

    May 7, 2024 · Giardiasis is an infection in your intestines caused by the Giardia parasite. Symptoms include diarrhea and fatigue. Antibiotics can treat it.

  5. Giardiasis - Wikipedia

    Giardiasis is a parasitic disease caused by the protist enteropathogen Giardia duodenalis (also known as G. lamblia and G. intestinalis), especially common in children and travelers. [3][4] Infected …

  6. Giardiasis - Family Doctor

    Nov 1, 2024 · It is caused by a microscopic parasite called Giardia lamblia. Once you have been infected with the parasite, it lives in your intestines. It is passed along through feces (poop). Anything …

  7. Giardiasis - Infectious Disease Advisor

    Jun 24, 2025 · Giardia duodenalis (also known as Giardia lamblia or Giardia intestinalis) is an extremely common intestinal parasite. 1,2 This parasite causes giardiasis, a small intestine infection that …

  8. Giardia infection: MedlinePlus Medical Encyclopedia

    Giardia, or giardiasis, is a parasitic infection of the small intestine. A tiny parasite called Giardia lamblia causes it.

  9. Giardiasis (Giardia Infection): Symptoms, Causes, Treatment

    Nov 23, 2024 · Giardiasis, also known as a giardia infection, is an intestinal disease marked by diarrhea, cramps, nausea, and bloating. A tiny parasite called Giardia intestinalis causes the infection.

  10. About Giardia Infection | Giardia | CDC

    May 3, 2024 · Key points Giardia is a tiny parasite (germ) that causes diarrhea. Giardia can spread easily from one person to another or through water, food, surfaces, or objects. A healthcare provider …