Which lab tests are performed in the workup of peritonsillar abscesses (PTAs)?

Updated: Sep 03, 2020
  • Author: Jorge Flores, MD; Chief Editor: Jeter (Jay) Pritchard Taylor, III, MD  more...
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No definitive studies are required to diagnose PTA. The following laboratory tests may be considered:

  • Basic studies, such as complete blood count, electrolytes, and C-reactive protein (if the patient has significant comorbidities)

  • Monospot test/heterophile antibody test (to rule out infectious mononucleosis if the etiology is unclear)

  • Culture of fluid from needle aspiration (to guide antibiotic selection or changes)

  • Blood cultures (if the clinical presentation is severe)

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