Role of Viruses - cause serious infection

• dermatropic - affect the skin, mucosa membrane of the nose and mouth.
• small pox - barreliota variolae, pus formed at the face, hand forearms and later in the legs.
• chicken pox - Varicella zoster virus, itch blisters, rasnd and fever, headache and burning painveherpes simplex "fever blsiters or cold sores" - herpes simplex virus, herpes virus varicellae.
• meases - childhood disease - rubella virus warts and viral tumors - human papillomavirus.
• Trachoma, Inclusion conjunctivitis - Chlamydozoon trachoma, Chlamuydozoon oculogenitale
• Foot and mouth disease - Picornaviridae - Family Aphhthovirus
• Viscerotrophic & systemic - affects the deep tissues and organs.
• yellow fever - charon evagatus, transmitted by Aedes algyypti, affects the liver, jaundice.
• Dengue fever - breakbone disease, transmitted by Aedes aegypti.
• Infectious hepatitis - gastrointestinal symptoms,s, jaundice and liver damage.
• Mumps - Epidemic parotidutus - Myxovirus parotiditis
• Enteric - affect the gastrointestinal tract, transmission is by hand and foot, objects contaminated by feces.
• Pneumotropic - affects the respiratory tract.

  Ex.

  • Influenza - Hemophilus influenzae, Myxovirus influenze,
  • Common cold - Rhinovirus, Adenovirus, Myxoovirus.
  • Pneumonitis - Respiratory syncytial virus.