Understanding Your Laboratory Test: Purpose, Sample Collection, and What Happens in the Lab
A throat culture test identifies and analyzes aerobic bacteria present in your throat to diagnose infections.
{"This test detects harmful bacteria causing throat infections like strep throat","A healthcare provider collects a sample using a throat swab","Results help doctors determine if antibiotics are needed","The test identifies specific bacteria to guide targeted treatment","Results are typically available within 2-3 days"}
Key facts at a glance
- LOINC
- 17903-6
- Short code
- THRBAC6
- Synonyms
- Bacteria Throat Aerobe Cult org #6
- Category
- chemistry
- Sample
- serum
- Container
- Sterile transport swab system (e.g., Copan ESwab, Amies or Stuart's transport medium), or culturette swab with transport medium. Aerobic culture transport kit designed for throat specimens.
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- aerobic-culture
- CPT
- 87077
- SNOMED
- 178921001
- Specimen volume
- Single throat swab collected by rubbing the posterior pharynx, tonsillar areas, and any areas of exudation or inflammation. Ensure swab contacts inflamed or exudative areas.
- Stability
- Room temperature: stable for up to 2 hours. Refrigerated (2-8°C): stable for up to 24 hours. Do not freeze. Process specimen as soon as possible to maximize recovery of fastidious organisms.
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 48–120 hours
- Order
- routine
What is this test, what does it measure, and why might my healthcare provider recommend it as part of my care?
A throat bacteria culture (also called throat culture or aerobic throat culture) is a laboratory test that detects and identifies bacteria growing in the throat. The test uses aerobic culture methods, meaning it grows bacteria in the presence of oxygen. This helps doctors identify the specific microorganism causing your throat infection.
How is the sample for this test collected, and what can I expect during the collection process?
A healthcare professional will use a sterile swab to collect a sample from the back of your throat and tonsils. You may be asked to say 'ahhh' while the swab is taken. The sample is then placed in a special container and sent to a laboratory for analysis. In some cases, multiple swabs may be collected to ensure accurate results.
What happens to my sample in the laboratory, and how is it analyzed to produce my test results?
In the lab, the sample is placed on growth media and incubated to allow bacteria to multiply. Technicians then examine the grown bacteria under a microscope and perform additional tests to identify the specific type of bacteria. If harmful bacteria are found, sensitivity testing may be performed to determine which antibiotics will be most effective.
Reference range
No growth of pathogenic bacteria (Target organism identification reported as isolated, predominant, or part of mixed flora)N/A
No fasting required. Patient should avoid eating, drinking, gargling, using mouthwash, chewing gum, or taking antibiotics for at least 1 hour prior to specimen collection, unless otherwise directed by the ordering physician. Do not collect through a tracheal tube or from epiglottis if epiglottitis is suspected.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Throat culture is primarily used to diagnose bacterial throat infections, most commonly strep throat (caused by Streptococcus pyogenes). Identifying the specific bacterium helps doctors prescribe the appropriate antibiotic and determine the duration of treatment. This test is crucial because viral throat infections do not require antibiotics, while bacterial infections do to prevent complications like rheumatic fever or kidney inflammation.
Frequently asked questions
Does a throat culture hurt?
How long does it take to get results?
Do I need to prepare for this test?
What do the results mean?
Sources
- 1
- 2
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy