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Urine Catheterization Fluid (Probe) for General Microbiology Culture

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of bacteria or other microorganisms in fluid collected from a urinary catheter. It helps determine if an infection is present in your urinary system.

Quick summary

["A positive result may indicate a urinary tract infection linked to your catheter."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
45627-7
Short code
EXTERNALCATHETER
Synonyms
—
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mds
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may order this test if you have symptoms like fever, pain or burning when urinating, or if you’re at higher risk for urinary infections, such as after surgery or long-term catheter use. It also helps monitor infections in patients with catheters to guide treatment.

What to Expect Before the Test

No special preparation is needed. The healthcare provider will collect a sample directly from your catheter. If you’re unsure, ask about any restrictions on food, drink, or medications before the test.

What Happens During the Test

A healthcare professional will attach a sterile tube to your catheter to collect fluid. The sample is then sent to a lab for culture and sensitivity testing to identify any bacteria or fungi present.

What Happens After the Test

You may resume normal activities immediately unless your doctor advises otherwise. Results will be reviewed by a healthcare provider to determine if treatment is needed, such as antibiotics.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Positive results indicate a urinary catheter-associated infection, which can cause discomfort, increase hospital stays, or lead to complications like kidney damage. Negative results suggest no active infection, but ongoing monitoring may still be required if you have a catheter.

Short name

Urine Catheter Sample Culture

Frequently asked questions

How long does it take to get results from this test?
Results typically take 24 to 72 hours, depending on lab processing times. Your doctor will contact you once they have the findings.
What are common symptoms of a urinary catheter infection?
Symptoms may include fever, chills, cloudy or strong-smelling urine, pain or burning during urination, or redness/swelling around the catheter insertion site.
Can I shower or bathe normally after the test?
Yes, you can shower or bathe as usual unless your doctor advises otherwise. Avoid soaking in tubs or hot tubs until cleared by your provider.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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