General Characteristics of Protozoa
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Questions and Answers

What is the mode of transmission for Giardia duodenalis?

  • Bloodborne transmission
  • Airborne transmission
  • Fecal-oral transmission (correct)
  • Sexual intercourse

    • What is the resistant form of Giardia responsible for transmission?

  • Trophozoite with 2 nuclei
  • Cyst with 2 nuclei
  • Cyst with 4 nuclei and flagella (correct)
  • Trophozoite with 8 flagella

    • What is the therapy of choice for the treatment of giardiasis?

  • Ciprofloxacin
  • Metronidazole (correct)
  • Doxycycline
  • Amoxicillin

    • What is the primary mode of transmission for Trichomonas vaginalis?

    <p>Sexual intercourse</p> Signup and view all the answers

    What is the form in which Trichomonas vaginalis exists?

    <p>Trophozoite with 1 nucleus and 4 flagella</p> Signup and view all the answers

    What is the size range of protozoa?

    <p>2 – 100 µm</p> Signup and view all the answers

    Which type of reproduction involves multiple splitting?

    <p>Schizogony</p> Signup and view all the answers

    In which form do many protozoa develop under harsh environmental conditions?

    <p>Cyst form</p> Signup and view all the answers

    What is the characteristic of an indirect life cycle of a parasite?

    <p>Develops necessarily in 2 or more hosts belonging to different species</p> Signup and view all the answers

    Which pathogenic mechanism do many parasites have to invade the human host?

    <p>Penetrate the anatomic barriers, attach to specific host cells or organs, avoid immune detection, replicate, and produce toxic substances</p> Signup and view all the answers

    What is the typical size range of protozoa?

    <p>50 - 200 µm</p> Signup and view all the answers

    Which type of protozoa lives in host cells, at least in some stages?

    <p>Intracellular protozoa</p> Signup and view all the answers

    What is the primary mode of transmission for Trypanosomes?

    <p>Vector-borne</p> Signup and view all the answers

    In which form do many protozoa develop under harsh environmental conditions?

    <p>Cyst form</p> Signup and view all the answers

    What is the pathogenic mechanism of many parasites to invade the human host?

    <p>Producing toxins that destroy tissue</p> Signup and view all the answers

    What is the primary mode of transmission for Giardia duodenalis?

    <p>Fecal-oral transmission</p> Signup and view all the answers

    What is the characteristic of the trophozoite form of Giardia duodenalis?

    <p>Pear-shaped with 2 nuclei and 8 flagella</p> Signup and view all the answers

    What is the therapy of choice for the treatment of Trichomonas vaginalis?

    <p>Metronidazole</p> Signup and view all the answers

    What clinical syndromes are associated with chronic giardiasis?

    <p>Weight loss and alternating diarrhea/constipation</p> Signup and view all the answers

    Which diagnostic method is NOT used for the detection of Giardia duodenalis?

    <p>Serological testing</p> Signup and view all the answers

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