Understanding Your Laboratory Test: Purpose, Sample Collection, and What the Results Mean for Your Health
A laboratory test that identifies and grows bacteria from a urethral sample to diagnose infections of the urinary tract or urethra.
{"This test detects harmful bacteria in the urethra using aerobic culture methods","It helps diagnose urethritis, urinary tract infections, and sexually transmitted infections","Results typically take 2-5 days as bacteria need time to grow","A positive result means bacteria were found and may require antibiotic treatment","The test uses a swab or urine sample collected from the urethra"}
Key facts at a glance
- LOINC
- 14477-4
- Short code
- URETHRA_CULT
- Synonyms
- Bacteria Urth Aerobe Cult
- Category
- chemistry
- Sample
- serum
- Container
- Sterile transport swab system (e.g., Amies or Stuart transport medium) or sterile screw-capped container for urethral discharge. Inoculated culture media (e.g., Thayer-Martin agar for gonococcal isolation) may be submitted directly.
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- aerobic-culture
- CPT
- 87086
- SNOMED
- 2525009
- Specimen volume
- Minimum 0.5 mL of urethral discharge or one to two swabs collected from the urethral meatus
- Stability
- Room temperature: 2 hours; Refrigerated (2-8°C): 24 hours in transport medium. Specimens should be processed as soon as possible after collection to maximize pathogen recovery. Do not freeze.
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 24–72 hours
- Order
- routine
This test is a laboratory analysis performed on a small sample from your body, such as blood or urine, that gives your healthcare provider important information about how your organs are working and whether any underlying conditions need further attention or treatment.
The Bacteria Identified in Urethra by Aerobe Culture test is a laboratory procedure that collects a sample from your urethra to detect and identify bacteria that may be causing an infection. The term 'aerobic' means the test specifically grows bacteria that need oxygen to survive. This test is commonly used to diagnose urethritis (inflammation of the urethra), urinary tract infections (UTIs), and certain sexually transmitted infections (STIs) like gonorrhea.
Your sample is usually collected at a clinic, hospital, or laboratory. A trained technician may draw blood from a vein in your arm using a thin needle, or you may be asked to provide a urine, swab, or stool sample, depending on what your provider has ordered.
For this test, a healthcare provider will collect a sample using a sterile swab inserted gently into the urethra, or you may be asked to provide a urine sample (specifically the first part of your urine stream). The sample is then placed in a special container and sent to a laboratory where it is cultured (placed in conditions that allow bacteria to grow and multiply for identification).
Your provider may order this test to help diagnose the cause of symptoms you are experiencing, to screen for a condition before it causes problems, to check how well a current treatment is working, or to monitor an ongoing health condition over time.
Your doctor may order this test if you have symptoms such as pain or burning during urination, unusual discharge from the urethra, pain in the lower abdomen, or frequent urination. It is also commonly performed as part of routine screening for sexually transmitted infections, especially if you have multiple sexual partners or symptoms suggestive of an infection.
Reference range
No growth of pathogenic bacteria; normal urethral flora may include coagulase-negative staphylococci, Corynebacterium species, and other commensal organisms in low quantities. Results reported as organism identified with colony count and susceptibility profile when clinically significant.N/A
Patient should abstain from urination for at least 1-2 hours prior to specimen collection. External genital hygiene should be performed prior to collection. Discontinue topical or systemic antimicrobial therapy for at least 48-72 hours before collection when clinically feasible. Avoid sexual intercourse for 24 hours prior to specimen collection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is clinically significant because it identifies the specific bacteria causing your infection, which helps your doctor determine the most appropriate treatment. If pathogenic bacteria are found, the laboratory may also perform antibiotic sensitivity testing (susceptibility testing) to determine which antibiotics will effectively treat the infection. Common pathogens detected include Escherichia coli (E. coli), Staphylococcus species, Streptococcus species, and Neisseria gonorrhoeae (the cause of gonorrhea). A negative result suggests your symptoms may be caused by other factors such as viruses, fungi, or non-infectious conditions.
Frequently asked questions
Does the sample type (serum) affect the test results?
How long does it take to get results?
Do I need to prepare for the test?
What happens if bacteria are found?
Is this test painful?
Sources
- 1
- 2
- 3CDC - GonorrheaSource
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