Is posttreatment throat culture indicated in the treatment of group A streptococcal (GAS) infections?

Updated: Sep 07, 2018
  • Author: Zartash Zafar Khan, MD, FACP; Chief Editor: Pranatharthi Haran Chandrasekar, MBBS, MD  more...
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Routine throat culture is unnecessary in asymptomatic patients who have completed a course of antibiotic therapy, except in special circumstances. Symptoms that persist after a treatment course may have several explanations, including the following:

  • Persistent carriage in the face of intercurrent viral infection

  • Noncompliance with the prescribed antimicrobial regimen

  • A new GAS infection acquired from family, the classroom, or community contacts

  • A recurrent episode of pharyngitis caused by the original infecting strain of GAS (ie, treatment failure)

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