Influenza Viruses: Antigenic Drift and Variation
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Questions and Answers

Which of the following is responsible for penetration and budding?

  • Antigenic shift
  • Antigenic drift
  • Hemagglutination
  • Neuraminidase (correct)

What is the result of antigenic shift?

  • Minor changes in antigenic structures
  • No change in the antigenic structure
  • Only occurring in Influenza B
  • Drastic change in the antigenic structure resulting in new H and N antigens (correct)

Which of the following is an example of Antigenic drift?

  • Point mutations in the viral genes encoding the HA and NA spikes (correct)
  • Reassortment of genomes
  • Spanish Flu
  • Asian Flu

Which of the following is NOT a mechanism of antigenic shift?

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

Which flu is an example of highly pathogenic avian influenza (HPAI)?

<p>H5N1 Avian Flu (C)</p> Signup and view all the answers

What is the result of the reassortment of genomes in antigenic shift?

<p>A new strain of influenza virus (A)</p> Signup and view all the answers

What type of RNA does Orthomyxoviridae have in its genome?

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

Which of the following is NOT a diagnostic method for Influenza?

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

What is the primary function of Neuraminidase Inhibitors in Influenza treatment?

<p>To inhibit the release of viral particles from the host cell (B)</p> Signup and view all the answers

What is the primary goal of Orthomyxoviridae antigenic variation?

<p>To evade the host's immune system (C)</p> Signup and view all the answers

What is the composition of the Influenza A virus?

<p>8 segments of ssRNA (D)</p> Signup and view all the answers

What is the primary method of preventing Influenza?

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

What is the primary mode of transmission for Retroviridae?

<p>Sexual contact and injection drug use (C)</p> Signup and view all the answers

Which generation of HIV tests detects and differentiates all three HIV analyte markers?

<p>5th generation (D)</p> Signup and view all the answers

What is the result of opportunistic infections in individuals with MOT disease?

<p>All of the above (D)</p> Signup and view all the answers

What is the purpose of ELISA screening in HIV diagnosis?

<p>To screen for HIV infection in high-risk populations (D)</p> Signup and view all the answers

What is the consequence of antigenic variation in HIV?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary goal of pandemic prevention strategies for Retroviridae?

<p>To reduce transmission through sexual contact (B)</p> Signup and view all the answers

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