Contents
How to Know If Your Sore Throat Needs a Test
Published: Dec 17, 2023
Not every sore throat requires a medical test, but knowing when to get tested can prevent complications and unnecessary treatments.
When Testing for GAS is Necessary
Testing for Group A Streptococcus (GAS) is crucial if you have symptoms like a sudden sore throat, fever, and swollen neck lymph nodes. The Centor criteria, which include tonsillar exudates and no cough, can help decide if testing is needed. Testing is usually reserved for those with three or more Centor criteria.
Types of Tests Available
There are two main types of tests for diagnosing GAS pharyngitis: the rapid antigen detection test (RADT) and the nucleic acid amplification test (NAAT). RADTs are quick and specific, but NAATs are more sensitive and can be used if RADT results are negative but suspicion remains.
Understanding Test Results
A positive RADT or NAAT confirms GAS pharyngitis, and antibiotics are recommended. If RADT is negative, further testing is usually not needed unless there's a high risk of complications. In such cases, a throat culture or NAAT can verify the results.
Frequently Asked Questions
A tool to help decide if GAS testing is needed.
It confirms GAS pharyngitis and suggests antibiotics.
Yes, it's more sensitive than RADT.
When RADT is negative and there's high suspicion of GAS.
The Bottom Line
Testing can clarify the cause of a sore throat, guiding appropriate treatment.
References
- Centor RM, Atkinson TP, Waites KB. Fusobacterium-Positive and Streptococcal-Positive Pharyngitis. Ann Intern Med 2015; 162:877.
- Webb KH, Needham CA, Kurtz SR. Use of a high-sensitivity rapid strep test without culture confirmation of negative results: 2 years' experience. J Fam Pract 2000; 49:34.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic. Always discuss health information with your healthcare provider.
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