Virology Flashcards
Poxviridae characteristics
- Zoonotic infections
- Man is accidental host
- Usually transmitted by direct contact
- Molluscum contagiosum also sexually transmitted
Poxvirus types
- Variola major
- Cowpox
- Molluscum contagiosum
Variola major
Host: Man
Disease: Smallpox
Cowpox virus
Host: cattle
Disease: hemorrhagic ulcer
Molluscum contagiosum
Host: man
Disease: chronic, multiple nodules (umbilicated appearance), vesicular rash on face and neck
Parvoviridae (parvovirus) types
• Parvovirus B19
Parvovirus B19
Transmission: aerosol
Disease: Erythema infectiosum (slapped cheek syndrome)
Hepadnaviridae (hepadnavirus) characteristics
Transmitted through
• injection (parenteral)
• sexual contact
• perinatal route (vertical)
Hepadnavirus types
Hepatitis B
Hepatitis B characteristics
Host: man
Disease: hepatitis, cirrhosis, liver cancer
Herpesviridae (herpesvirus) types
- HSV-1
- VZV
- EBV
HSV-1
Transmission: oral, close contact
Disease: gingivostomatitis (cold sores)
VZV (Varicella Zoster Virus)
Transmission: aerosol, close contact, congenital
Disease: varicella (chickenpox), zoster (shingles)
EBV (Epstein-Barr Virus)
Transmission: close contact
Disease: Burkitt’s lymphoma
Infectious mononucleosis
Papillomaviridae (papillomavirus) types
HPV
HPV
• Transmission: close contact
Disease: warts
• Transmission: genital
Disease: condyloma acuminata (genital warts), cervical cancer
Adenoviridae (adenovirus) characteristics
Transmission: respiratory aerosol/ocular secretions Diseases: • Respiratory • Conjunctivitis • Haemorrhagic cystitis • Gastroenteritis • Pharyngitis, pharyngeal-conjunctival fever (infants) • Tonsils infection
Caliciviridae (calicivirus) characteristics
Transmitted through food and water (fecal-oral spread)
Calicivirus types
- Human Norwalk virus
* Human Sapporo virus
Human Norwalk virus
Host: man
Disease: Epidemic gastroenteritis (vomiting in children, diarrhoea in adults)