Urine Culture & Sensitivity Test
Category
Microbiology
Specimen
Urine (midstream)
Organ System
—
Available At
0 labs
About Urine Culture & Sensitivity Test
A Urine Culture & Sensitivity test grows any bacteria present in a urine sample in a laboratory setting over 24 to 48 hours, then identifies exactly which type of bacteria is causing an infection and which antibiotics will effectively treat it.
This is fundamentally different from a basic urinalysis, which can only suggest that an infection is likely present — a culture provides definitive confirmation and, critically, the specific antibiotic sensitivity information doctors need to prescribe the most effective treatment rather than a broad guess.
This distinction matters increasingly given rising rates of antibiotic resistance, since a culture can reveal when a common first-line antibiotic won't actually work against the specific bacteria causing your infection.
The test is especially valuable for recurrent urinary tract infections, complicated infections, or when initial treatment hasn't resolved symptoms.
When Should You Get Urine Culture & Sensitivity Test
This test is ordered when there's:
- Suspected urinary tract infection with symptoms like burning or urgency
- Recurrent or persistent urinary infections
- Fever with no other obvious source, particularly in young children or the elderly
- Failure of symptoms to improve after initial antibiotic treatment
Conditions Urine Culture & Sensitivity Test Can Detect
This test diagnoses and guides treatment for:
- Urinary tract infections, confirming the exact bacteria involved
- Recurrent or complicated urinary infections
- Antibiotic-resistant infections, by identifying which drugs remain effective
How to Prepare for Urine Culture & Sensitivity Test
- Collect a clean-catch midstream sample carefully, following your lab's specific instructions, to avoid contaminating the sample with skin bacteria.
- Ideally, this sample should be collected before starting any antibiotics, since prior treatment can suppress bacterial growth and lead to a falsely negative result.
- Deliver the sample to the lab promptly, as delayed processing can allow bacterial overgrowth that distorts results.
Urine Culture & Sensitivity Test Normal Reference Ranges
| Parameter | Normal Range |
|---|---|
| Normal | No significant bacterial growth (typically reported as fewer than 10,000 colony-forming units per mL) |
A significant bacterial growth count, combined with symptoms, confirms a urinary tract infection, and the accompanying sensitivity report lists which antibiotics the bacteria are susceptible to, guiding your doctor's treatment choice.
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Frequently Asked Questions About Urine Culture & Sensitivity Test
How long does a urine culture take?
Results typically take 24–48 hours, since the lab needs time to grow and identify any bacteria present before testing antibiotic sensitivity.
Should I start antibiotics before this test?
Ideally, the sample should be collected before starting antibiotics, as prior treatment can suppress bacterial growth and lead to an inaccurate, falsely negative result.
Why does my doctor need to know which antibiotic works best?
With rising antibiotic resistance, a culture and sensitivity report ensures you're prescribed a medication that will actually be effective against your specific infection, rather than relying on a general assumption.
Medical Disclaimer: This page is for informational purposes only and does not constitute medical advice. Lab test results should always be interpreted by a qualified healthcare professional in the context of your clinical history. Do not self-diagnose or alter your treatment based on test results alone.
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