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🦠microbiology review

Tonsillitis

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Tonsillitis is an inflammation of the tonsils, typically caused by viral or bacterial infections. It results in sore throat, difficulty swallowing, and swollen tonsils.

5 Must Know Facts For Your Next Test

  1. Tonsillitis is most commonly caused by Group A Streptococcus bacteria and various viruses.
  2. Symptoms include sore throat, fever, swollen lymph nodes, and white or yellow patches on the tonsils.
  3. It can be diagnosed through a physical examination, throat swab culture, or rapid strep test.
  4. Treatment may involve antibiotics for bacterial infections or supportive care such as rest and hydration for viral causes.
  5. Chronic or recurrent tonsillitis may require surgical removal of the tonsils (tonsillectomy).

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