Pharyngitis - Causes

Acute Pharyngitis:
  - Viral infection: rhinovirus, adenovirus, Coxsackie virus,coronavirus, herpes simplex virus, Epstein-Barr virus,cytomegalovirus
  - bacterial infection: beta hemolytic streptococcus groupA, Neisseria gonorrhoeae, Haemophilus influenzae,streptococci other
  - etiology physics: thermal burns, chemical, etc..
  - early stages or infection that accompanies measles,scarlet fever, measles, etc..

Chronic Pharyngitis:
  - constitutional fragility of the mucosa
  - various external factors: dust, chemical burn, heat,extreme temperature variations, occupational exposure toair currents, the stuffy dry air, excessive use of airconditioning, intoxication with alcohol and tobacco, the abuse of nasal drops
  - endogenous factors: mouth breathing, nasal obstruction,chronic sinusitis, enlarged adenoids
  - Hormonal disorders: menopause, hypothyroidism,diabetes
  - Vitamin A deficiency
  - respiratory failure
  - chronic bronchitis
  - Improper use of voice teachers, politicians, singers, etc..