Pharyngitis and Tonsillitis Symptoms & Causes

There are many causes of infections in the throat. The following are the most common infectious agents:

• viruses:
  • adenovirus
  • influenza virus
  • Epstein-Barr virus
  • herpes simplex virus
    
• bacteria:
  • group A beta-hemolytic streptococci (GABHS)
  • Neisseria gonorrhea
  • Haemophilus influenzae Type B
  • mycoplasma
    
• fungal infections
  
• parasitic infections
  
• cigarette smoke