Microbiology• Updated 21 October 2026
Throat Swab (Strep Test)
A swab from the back of the throat to check for strep bacteria that cause some sore throats.
Results: Rapid test: minutes; culture: 1–2 days Specimen: Throat swab
Quick Summary
Primary Purpose
To find out whether a sore throat is caused by strep bacteria and needs antibiotics.
What It Measures
Group A Streptococcus.
Preparation
Don't eat or drink for 30 minutes before.
Overview
Treating strep throat helps prevent rheumatic fever.
Most sore throats are viral and don't need antibiotics.
What It Measures
Group A strep
Bacteria.
How It's Performed
- 01
Swab
The back of the throat and tonsils are swabbed.
- 02
Test
Rapid test or culture.
- 03
Result
Guides antibiotics.
Interpreting Results & Next Steps
Discuss with Doctor
Your doctor will explain what your result means and what happens next.
If values are High:
Positive means strep throat, usually treated with antibiotics.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Strep A Test(opens in a new tab) · MedlinePlus, US National Library of Medicine