DNA Viruses: Properties, Replication, and Diseases
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Questions and Answers

What is the mode of transmission for Human Simplex viruses, Varicella-Zoster virus, and Epstein-Barr virus?

  • Vector-borne transmission
  • Bloodborne transmission
  • Respiratory droplets (correct)
  • Fecal-oral route

What is the genetic material of Herpes Simplex Virus 1 (HSV-1)?

  • dsDNA linear (correct)
  • ssRNA
  • dsDNA circular
  • ssDNA

Which DNA virus is associated with the development of cervical cancer?

  • Parvovirus B19
  • Human Papillomavirus (correct)
  • Hepatitis B virus
  • Varicella-Zoster virus

What is a common characteristic of DNA viruses in terms of their replication strategies?

<p>Incorporation of viral DNA into host genome (B)</p> Signup and view all the answers

Which of the following is a preventative measure for DNA virus infections?

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

What is the shape of the capsid of Herpesviridae viruses like HSV?

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

Which DNA virus is responsible for causing chickenpox and shingles in humans?

<p>Varicella-Zoster virus (B)</p> Signup and view all the answers

Which DNA virus causes the clinical disease known as 'Chickenpox'?

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

What is a primary preventative measure against DNA virus infections?

<p>Avoiding close contact with infected individuals (D)</p> Signup and view all the answers

In DNA viruses, which genetic material orientation best describes Parvovirus B19?

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

What is the primary mechanism of action of pegylated interferon used for chronic hepatitis B?

<p>Enhancing macrophage and cytotoxic T cell activity (A)</p> Signup and view all the answers

How are the current Hepatitis B vaccines genetically engineered?

<p>By inserting the S gene (for HBsAg) (D)</p> Signup and view all the answers

Which type of vaccine for Hepatitis B is available for adults only and requires two doses given one month apart?

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

What is a key method for preventing Hepatitis B infections among healthcare workers?

<p>Using personal protective equipment (PPE) when handling blood (D)</p> Signup and view all the answers

Which of the following is a recommended method for reducing the risk of Hepatitis B transmission?

<p>Screening blood and pregnant women for viral antigens (C)</p> Signup and view all the answers

Which of the following serological profiles is expected in a 30-year-old female who was never infected with hepatitis B virus after being vaccinated?

<p>HBcAg +, Anti-HBcAg -, HBsAg -, Anti-HBsAg + (B)</p> Signup and view all the answers

Which DNA virus likely caused the presentation in the 30-year-old female with sore throat, mouth blisters, and a headache?

<p>Herpes simplex virus (HSV) (C)</p> Signup and view all the answers

Which virus likely caused the presentation in the 25-year-old female with fever, cervical lymphadenopathy, and sore throat with heterophile antibody production?

<p>Epstein-Barr virus (EBV) (A)</p> Signup and view all the answers

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