Pharyngitis
Definition
Pharyngitis is an inflammation of the pharynx. It frequently results in a sore throat. Pharyngitis may be caused by a variety of microorganisms.
Causes
Pharyngitis is caused by a variety of microorganisms. Most cases are caused by a virus, including the the common cold virus, flu (influenza) virus, adenovirus, mononucleosis, HIV, and various others.
Bacterial causes of pharyngitis include Group A streptococcus, which causes strep throat in about 15% of cases. Strep throat is a serious cause of pharyngitis. Other but less common bacteria found in sore throats include Corynebacterium, Arcanobacterium, Neisseria gonorrhoeae, and Chlamydia pneumoniae. In some cases, no organism is identified.
Most cases of pharyngitis occur during the colder months. It often spreads among family members.
References
Gerber MA. Diagnosis and treatment of pharyngitis in children.Pediatr Clin North Am. 2005 Jun;52(3):729-47, vi.
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