How is group A streptococcal (GAS) pharyngitis (strep throat) diagnosed?

Updated: May 06, 2020
  • Author: John R Acerra, MD; Chief Editor: Jeter (Jay) Pritchard Taylor, III, MD  more...
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Answer

This is the preferred method for diagnosing GAS infection in the emergency department because of difficulties with culture follow-up. (See the image below.)

Rapid antigen detection test for group A beta-hemo Rapid antigen detection test for group A beta-hemolytic streptococci.

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