Rapid strep test
This test screens for the group A streptococcus bacteria only. It will not detect other causes of sore throat.
A streptococcal screen is a test to detect group A streptococcus. This type of bacteria is the most common cause of strep throat.
The test requires a throat swab. The swab is tested to identify group A streptococcus. It takes about 7 minutes to get the results.
The back of your throat will be swabbed in the area of your tonsils. This may make you gag.
There is no special preparation. Tell your health care provider if you are taking antibiotics, or have recently taken them.
A negative strep screen most often means group A streptococcus is not present. It is unlikely that you have strep throat.
If your provider still thinks that you may have strep throat, a throat culture will be done in children and adolescents.
There are no risks.
A positive strep screen most often means group A streptococcus is present, and confirms that you have strep throat.
Sometimes, the test may be positive even if you do not have strep. This is called a false-positive result.
Your provider may recommend this test if you have signs of strep throat, which include:
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Nussenbaum B, Bradford CR. Pharyngitis in adults. In: Flint PW, Haughey BH, Lund V, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 6th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 9.
Shulman ST. Group A streptococcus. In: Kliegman RM, Stanton BF, St. Geme JW, Schor NF, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 183.
Weber R. Pharyngitis. In: Kellerman RD, Bope ET, eds. Conn's Current Therapy 2018. Philadelphia, PA: Elsevier Saunders; 2018;50-52.
Review Date: 2/24/2018
Reviewed By: Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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