DNA viruses and their diseases

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Questions and Answers

Adenovirus primarily causes respiratory illnesses.

True (A)

Adenovirus is known to cause heart disease.

False (B)

Hepadnavirus is the cause of Hepatitis C.

False (B)

Hepadnavirus is responsible for Hepatitis B.

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

Poxvirus is the smallest DNA virus.

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

Smallpox has been completely eradicated from the world.

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

Parvovirus is the largest DNA virus.

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

Parvovirus B19 causes 5th disease.

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

Herpes Simplex 1 causes genital herpes.

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

Cold sores are caused by Herpes Simplex 1.

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

Herpes Simplex 1 remains latent in the sciatic nerve.

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

Herpes Simplex 2 can cause encephalitis.

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

Herpes Simplex 2 remains latent in the trigeminal nerve.

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

Herpes Simplex 2 is often referred to as shingles.

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

Varicella-Zoster Virus causes chickenpox.

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

Shingles is a primary infection of Varicella-Zoster Virus.

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

Shingles is less common above 50 years of age.

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

Epstein-Barr Virus causes malaria.

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

Infectious mononucleosis is caused by the Epstein-Barr Virus.

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

Contact sports are encouraged for individuals with infectious mononucleosis.

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

Cytomegalovirus (CMV) always presents with severe symptoms.

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

CMV is the most common virus transmitted during pregnancy.

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

Cytomegalovirus can only be transmitted through sexual contact.

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

Human herpes virus 6 causes 5th disease.

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

HHV 7 is non-carcinogenic.

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

Papillomavirus is a bacteria.

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

The largest DNA virus is the Poxvirus.

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

Adenoviruses only cause respiratory illnesses.

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

Hepadnaviruses primarily affect the kidneys.

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

Smallpox is still a widespread disease today.

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

Varicella-Zoster Virus (VZV) is also known as HHV-1.

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

Epstein-Barr Virus (EBV) is also known as HHV-2.

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

Cytomegalovirus (CMV) is also known as HHV 5.

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

HHV 6 causes infectious mononucleosis.

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

HHV 7 is a non-carcinogenic virus.

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

Papillomavirus and Polyomavirus are both DNA viruses.

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

Flashcards

Adenovirus

Primarily causes respiratory illnesses but can also cause gastroenteritis, conjunctivitis, cystitis, and rashes.

Hepadnavirus

Causes Hepatitis B, a liver infection.

Poxvirus

The largest DNA virus, includes Variola virus, which caused smallpox (eradicated in 1981).

Parvovirus

The smallest DNA virus; B19 causes fifth disease (erythema infectiosum).

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Herpes Simplex 1 (HHV-1)

Causes cold sores or fever blisters (vesicles on lips), and remains latent in the trigeminal nerve.

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Herpes Simplex 2 (HHV-2)

Causes genital herpes and encephalitis; remains latent in the sacral nerve.

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Varicella-Zoster Virus (HHV 3, VZV)

Causes varicella (chickenpox) and shingles (herpes zoster); remains latent in dorsal nerve root.

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Epstein-Barr Virus (HHV-4, EBV)

Causes infectious mononucleosis (Mono, Glandular Fever, Kissing disease).

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Cytomegalovirus (CMV, HHV 5)

Causes asymptomatic or mild infection, but severe infection in immunocompromised patients; most common virus transmitted during pregnancy.

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Human herpes virus 6 (HHV 6)

Causes sixth disease.

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Study Notes

  • Several DNA viruses cause diseases in humans.

Adenovirus

  • Primarily causes respiratory illnesses
  • Can also lead to gastroenteritis, conjunctivitis, cystitis, and rashes

Hepadnavirus

  • Causes Hepatitis B

Poxvirus

  • The largest DNA virus
  • Variola virus causes Smallpox which was eradicated globally in 1981

Parvovirus

  • The smallest DNA virus
  • B19 causes fifth disease (erythema infectiosum)

Herpesvirus

  • Includes several types of viruses

Herpes Simplex 1 (HHV-1)

  • Causes cold sores or fever blisters (vesicles on lips)
  • Can also cause herpes whitlow (vesicles on fingers)
  • Remains latent in the trigeminal nerve

Herpes Simplex 2 (HHV-2)

  • Causes genital herpes and encephalitis
  • It is carcinogenic
  • Remains latent in the sacral nerve

Varicella-Zoster Virus (HHV-3, VZV)

  • Remains latent in the dorsal nerve root
  • Causes varicella (chickenpox)
  • Reactivation of latent HHV-3 causes shingles (herpes zoster)
  • Shingles is more common in people over 50 years old

Epstein-Barr Virus (HHV-4, EBV)

  • Causes infectious mononucleosis (Mono, Glandular Fever, Kissing disease)
  • More common in young adults
  • Contact sports should be avoided when infected
  • It is carcinogenic

Cytomegalovirus (CMV, HHV-5)

  • Causes asymptomatic or mild infections
  • Can cause severe infections in immunocompromised patients
  • Most common virus transmitted during pregnancy
  • Transmitted sexually, via body fluids (blood, semen, urine, milk), or transplanted tissues
  • It is carcinogenic

Human Herpes Virus 6 (HHV-6)

  • Causes sixth disease

HHV-7 & HHV-8

  • Are carcinogenic

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