VIRO

• All DNA viruses are double-stranded DNA, except Parvovirus which is single-stranded
• All DNA viruses are icosahedral, except Poxvirus which is complex
• All DNA viruses are enveloped, except Papovavirus, Adenovirus, and Parvovirus
• All DNA viruses multiply in the nucleus, except Poxvirus which multiplies in the cytoplasm
• Poxvirus is the largest DNA virus, while Parvovirus is the smallest
• Adenoviridae


  No. 1 viral cause of conjunctivitis
• There are 47 types of adenoviruses that affect humans
• Adenoviruses


  • Naked icosahedral with double-stranded linear DNA
  • Unusually stable to chemical or physical agents and adverse pH conditions, allowing prolonged survival outside the body
• Diseases caused by adenoviruses

  • Upper and lower respiratory diseases (pharyngitis, conjunctivitis, sore eyes, epidemic keratoconjunctivitis, pneumonia)
  • Gastroenteritis in children
• All DNA virus are ds-DNA except

  Parvovirus
• All DNA Virus are All are icosahedral except


  Poxvirus (COMPLEX)
• All DNA Virus are enveloped except

  Papovavirus, Adenovirus, Parvovirus

  
  

  - PAP
• All DNA Virus multiply in nucleus except

  Poxvirus (cytoplasm)
• Largest DNA virus


  Poxvirus
• Smallest DNA virus


  Parvovirus
• - Naked icosahedral: double stranded linear DNA\

  - Unusually stable to chemical or physical agents; adverse pH conditions

  - Causes upper and respiratory diseases

  Adenoviridae
• Adenovirus is the no. 1 cause of

  Viral conjunctivitis
• Adenoviridae causes


  - Pharyngitis (sore throat/Rhinitis)

  - Conjunctivitis (sore eye)

  - Pneumonia
• Adenoviridae incubation period if

  - Gastroenteritis in children

  - Incubation period

  3-10 days

  2-14 days
• Adenoviridae MOT


  droplets, the fecal-oral route or fomites
• Adenoviridae CPE


  Grape-like cluster
• Adenoviridae has how many serotypes

  47
• (Adenoviridae serotypes)

  - Acute Respiratory Disease


  Serotype 3,4,7,21
• (Adenoviridae serotypes)

  - Pharyngitis

  Serotype 3,7
• (Adenoviridae serotypes)

  - Epidemic Keratoconjunctivitis (conjunctivitis)


  Serotype 8,19
• (Adenoviridae serotypes)

  - Hemorrhagic Cystitis


  Serotypes 11,21
• (Adenoviridae serotypes)

  - Infantile Gastroenteritis


  Serotypes 40,41
• - Smallest DNA virus

  - naked - single stranded linear DNA

  - Also known as B19 Virus

  - Virus can stop production of RBC in the bone marrow

  - Aplastic crisis in patients with hemoglobinopathies and fetal infections (hydrops fetails)

  Parvoviridae
• (Parvoviridae)

  - classic childhood disease

  1. Measles (Rubeola)

  2. Scarlet Fever

  3. German Measles (Rubella)

  4. Duke's Disease (associated with S. aureus)

  5. B19 Virus

  6. Roseola infantum (Human Herpes virus 6 and 7)
• (Parvoviridae)

  - B19 Virus causes_______ which Affects children usually 4-12 years old

  Fifth diseases or Erythema infectiosum
• (Parvoviridae)

  - B19 virus or Parvovirus B19 is characterized by


  fever and slapped cheeks
• (Parvoviridae)

  - B19 virus replicates in


  - immature erythroid cell

  - adult bone marrow

  - fetal liver
• (Parvoviridae)

  Parvovirus B19 is classified under genus

  Erythrovirus
• - 2nd smallest DNA virus

  - Naked: double stranded circular supercoiled DNA

  Papovaviridae
• (Papovaviridae)

  - PAPOVA is an acronym for

  Papilloma, Polyoma, and Vacuolating Virus
• (Papovaviridae)

  - HPV that causes cervical cancer

  - most important Papovaviridae

  Papilloma
• (Papovaviridae)

  - BK Virus

  - JC Virus

  - Causes opportunistic infections on immuno-suppressed patients

  Polyoma
• (Papovaviridae)

  - Simian Vacuolating virus

  - does not affect humans

  Vacuolating virus
• (Papovaviridae)

  - Papilloma virus

  - 70 strains have been identified so far

  - Most prevalent viral sexually transmitted disease in the US


  Human Papilloma Virus
• (Papovaviridae)

  - HPV causes


  Human warts and Cervical cancer