Introduction to Parasitology
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Questions and Answers

What is the definition of a parasite?

  • An organism that lives within the body of the host
  • An organism that infects and obtains nourishment from another living being (correct)
  • An organism that cannot survive without a host
  • A small, multicellular organism

    • Which of the following is an example of an ectoparasite?

  • Pathogenic free-living amoeba
  • Toxoplasma gondii
  • Head louse (correct)
  • Hydatid disease

    • What is the difference between an obligate parasite and a facultative parasite?

  • Obligate parasites can live both as parasites and in a free-living state, while facultative parasites cannot. (correct)
  • Facultative parasites only infect humans accidentally, while obligate parasites do so intentionally.
  • Facultative parasites cannot exist without a host, whereas obligate parasites can.
  • Obligate parasites depend on the host for survival, while facultative parasites can choose to live freely.

    • What type of parasite is Toxocara canis?

    <p>Aberrant parasite</p> Signup and view all the answers

    In which category do protozoa and helminths fall under?

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

    How does an aberrant parasite differ from an accidental parasite?

    <p>Aberrant parasites cannot be transmitted from human to human, while accidental parasites can.</p> Signup and view all the answers

    What is the role of a definitive host in the life cycle of a parasite?

    <p>It harbors the adult parasite or the parasite replicates sexually</p> Signup and view all the answers

    Which of the following is NOT considered a potential source of infection for parasitic diseases?

    <p>Sterile medical equipment</p> Signup and view all the answers

    What is the role of a paratenic host in the life cycle of a parasite?

    <p>It harbors the larval form of the parasite, but the parasite does not develop further</p> Signup and view all the answers

    Which of the following modes of infection is NOT mentioned in the given text?

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

    What is meant by a 'simple' life cycle in the context of parasites?

    <p>The life cycle is completed in a single host</p> Signup and view all the answers

    Which of the following is a potential complication associated with parasitic infections?

    <p>Inflammation of tissues and blood vessels</p> Signup and view all the answers

    Which of the following statements about immunity in parasitic infections is true?

    <p>Acquired immunity involves both antibody-mediated and cell-mediated responses.</p> Signup and view all the answers

    What is the purpose of demonstrating parasites in various clinical specimens?

    <p>To diagnose the parasitic infection in the patient.</p> Signup and view all the answers

    Which of the following is NOT a method mentioned for demonstrating parasites?

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

    What is the primary characteristic used to classify parasites into three main groups?

    <p>Body structure</p> Signup and view all the answers

    Which of the following parasites belongs to the phylum Protozoa?

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

    What is the term used to describe the resistance offered by the host towards injury caused by a parasite?

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

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