Group A beta-hemolytic streptococcus is usually the cause of peritonsillar abscesses . Swollen tissues may obstruct the airway, which would be a life-threatening medical emergency.
Peritonsillar abscess is generally a disease of older children, adolescents, and young adults.
It has become relatively uncommon since the use of antibiotics to treat tonsillitis. Aspiration of the abscess usually shows fluid containing pus. Culture of the fluid may show bacteria. Treatment is aimed at curing the infection and relief of symptoms. Antibiotics may be given if the infection is bacterial.