Throat anatomy
Throat anatomy


Pharyngitis

Definition:
Pharyngitis is an inflammation of the pharynx that frequently results in a sore throat. It may be caused by a variety of microorganisms.

Causes, incidence, and risk factors:

Pharyngitis is caused by a variety of microorganisms. Most cases are caused by a virus, including the virus causing the common cold, flu (influenza virus), adenovirus, mononucleosis, HIV, and various others.

Bacterial causes include Group A streptococcus, which causes strep throat, in addition to corynebacterium, arcanobacterium, Neisseria gonorrhoeae, Chlamydia pneumoniae, and others. In up to 30% of cases, no organism is identified.

Most cases of pharyngitis occur during the colder months -- during respiratory disease season. It often spreads among family members.

Strep throat is a serious cause of pharyngitis. The complications of strep throat can include acute rheumatic fever, kidney dysfunction, and severe diseases such as bacteremia and streptococcal toxic shock syndrome.




Review Date: 5/21/2003
Reviewed By: A.D.A.M. editorial. Previous review by Rocio Hurtado, M.D., Infectious Diseases Division, Massachusetts General Hospital and Brigham and Women's Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.

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