Parasitology Lecture 1

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Questions and Answers

What is the main difference between Trophozoite and Cyst/ oocyst in Protozoa?

  • Trophozoite is the unactive and infective form, while Cyst/ oocyst is the active, feeding, pathogenic stage
  • Trophozoite is the reproductive stage, while Cyst/ oocyst is the locomotion stage
  • Trophozoite is the active, feeding, pathogenic stage, while Cyst/ oocyst is the unactive and infective form (correct)
  • Trophozoite is the dormant stage, while Cyst/ oocyst is the motile stage

Which group of organisms are living organisms that depend on a living host for their nourishment and shelter?

  • Parasites (correct)
  • Pathogens
  • Commensals
  • Symbiotes

What are the three major groups of parasites in medical parasitology?

  • Protozoa, Helminthes, Arthropods (correct)
  • Mites, Ticks, Lice
  • Bacteria, Viruses, Fungi
  • Nematodes, Trematodes, Cestodes

Which class of Protozoa consists of parasites that move by means of pseudopodia?

<p>Sarcodina (Amoebas) (D)</p> Signup and view all the answers

What is the scientific name composed of two parts for parasites?

<p>&quot;Genus name and species name&quot; (A)</p> Signup and view all the answers

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Study Notes

Protozoa Characteristics

  • Trophozoite: actively feeding and multiplying stage of Protozoa, while Cyst/Oocyst: dormant, resistant stage that can survive outside of host

Parasitism

  • Parasites: living organisms that depend on a living host for nourishment and shelter

Medical Parasitology

  • Three major groups of parasites: Protozoa, Helminths, Ectoparasites

Protozoan Movement

  • Amoeba: class of Protozoa that move by means of pseudopodia

Parasite Nomenclature

  • Scientific name for parasites is composed of two parts: genus and species

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