Protozoan Infections and Life Cycle
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Questions and Answers

What is Entamoeba histolytica?

  • A type of sporozoan protozoan.
  • A commensal amoeba that does not cause disease in humans.
  • A pathogenic amoeba that can cause intestinal disease and liver abscess in humans. (correct)
  • A type of flagellated protozoan.

    • What is the main difference between the trophozoite and cyst stages of protozoa?

  • The trophozoite is found in soil, while the cyst is found in water.
  • The trophozoite is active, while the cyst is dormant. (correct)
  • The trophozoite has a protective membrane, while the cyst does not.
  • The trophozoite is dormant, while the cyst is active.

    • How is Entamoeba histolytica typically transmitted?

  • Through an infected mosquito bite.
  • Through direct contact with an infected person.
  • Through the fecal-oral route. (correct)
  • Through contaminated air.

    • What is the primary mode of diagnosis for Entamoeba histolytica?

    <p>Direct Fecal Smear (DFS) for trophozoites and Formalin Ether/Ethyl Acetate Concentration Test (FECT) for cysts. (C)</p> Signup and view all the answers

    What is the treatment for Entamoeba histolytica infection?

    <p>Metronidazole. (B)</p> Signup and view all the answers

    What is Entamoeba dispar?

    <p>A commensal amoeba that does not cause disease in humans. (A)</p> Signup and view all the answers

    What is the characteristic feature of the trophozoite stage of Acanthamoeba sp.?

    <p>Thorn-like appendages (C)</p> Signup and view all the answers

    What is the primary mode of transmission of Acanthamoeba sp.?

    <p>Contaminated food and water (A)</p> Signup and view all the answers

    What is the typical diagnosis for Acanthamoeba keratitis?

    <p>Epithelial biopsy or corneal scrapings (C)</p> Signup and view all the answers

    What is the primary prevention method for Acanthamoeba sp. infection?

    <p>Meticulous contact lens hygiene (A)</p> Signup and view all the answers

    What is the typical treatment for Acanthamoeba keratitis?

    <p>Surgical excision of infected cornea with corneal transplantation (D)</p> Signup and view all the answers

    What is the disease caused by Acanthamoeba sp. infection of the nasal tissue?

    <p>Granulomatous amebic encephalitis (GAE) (D)</p> Signup and view all the answers

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