Microbiology and Parasitology Introduction Quiz
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Questions and Answers

What is the main difference between biologic vectors and mechanical vectors?

  • Mechanical vectors are more efficient at transmitting parasites than biologic vectors.
  • Biologic vectors carry more parasites than mechanical vectors.
  • Biologic vectors carry parasites only after development within the vector organism, while mechanical vectors transport the parasite directly to another host. (correct)
  • Mechanical vectors carry parasites that have undergone development within the vector organism, while biologic vectors do not.

    • How does the Aedes mosquito transmit parasites to another susceptible host?

  • By carrying the parasite directly from the infected host to the susceptible host.
  • After the parasite has undergone development within the Aedes mosquito and reached the L3 stage. (correct)
  • By transmitting parasites at the L1 stage directly to another susceptible host.
  • By ingesting parasites from an infected host and transmitting them unaltered to another susceptible host.

    • Which of the following correctly describes mechanical vectors?

  • They transport parasites directly to another host without development within the vector organism. (correct)
  • They are more common in transmitting filariasis.
  • They can only transmit parasites at the L3 stage.
  • They carry more parasites than biologic vectors.

    • What type of organisms can act as mechanical vectors for transmitting enteric organisms to humans?

    <p>Flies and cockroaches that feed on fecal material.</p> Signup and view all the answers

    Which statement best describes a parasite?

    <p>An organism that grows, feeds, and shelters on or in a different organism without contributing to the survival of the host.</p> Signup and view all the answers

    'Phoretic vectors' are most similar in function to which of the following?

    <p>'Hitchhikers' that carry parasites on their bodies without being affected by them.</p> Signup and view all the answers

    What happens when an Aedes mosquito sucks blood from a filariasis patient?

    <p>The parasite undergoes several stages of development from L1 to L3 before transmission occurs.</p> Signup and view all the answers

    How do flies and cockroaches contribute to the transmission of enteric organisms to humans?

    <p>By feeding on contaminated material and carrying enteric organisms on their bodies.</p> Signup and view all the answers

    'Biologic vectors' and 'mechanical vectors' can be distinguished by which factor?

    <p>'Biologic vectors' only transmit parasites after development within themselves, while 'mechanical vectors' transport them directly.</p> Signup and view all the answers

    'Phoretic vectors' primarily act as carriers for parasites by...

    <p>...transporting parasites without being affected by them.</p> Signup and view all the answers

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