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

What is the form in which Trichomonas vaginalis exists?

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

What is the size range of protozoa?

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

Which type of reproduction involves multiple splitting?

<p>Schizogony (A)</p> Signup and view all the answers

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

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

What is the typical size range of protozoa?

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

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

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

What is the primary mode of transmission for Trypanosomes?

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

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

<p>Cyst form (C)</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 (B)</p> Signup and view all the answers

What is the primary mode of transmission for Giardia duodenalis?

<p>Fecal-oral transmission (B)</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 (D)</p> Signup and view all the answers

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

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

What clinical syndromes are associated with chronic giardiasis?

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

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

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

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