Throat culture
Medically reviewed by Drugs.com. Last updated on Feb 3, 2025.
What is the test?
A throat infection with Streptococcus bacteria (called strep throat) needs to be treated with an antibiotic. A throat culture is the traditional test used for identifying Streptococcus bacteria on your throat surface. Throat cultures also can identify some other bacteria that can cause sore throat.
How do I prepare for the test?
No preparation is necessary.
What happens when the test is performed?
A cotton swab is rubbed against the back of your throat to gather a sample of mucus. This takes only a second or two and makes some people feel a brief gagging or choking sensation. The sample may be tested immediately to see if you have strep throat. Your doctor may also take a second sample to place on a culture plate that helps any bacteria present in the mucus grow, so they can be more thoroughly examined and identified.
What risks are there from the test?
There are no risks.
Must I do anything special after the test is over?
No.
How long is it before the result of the test is known?
Results from a rapid strep test will be available within minutes. A full culture can take up to three days.
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.