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Pneumococcal Antigen in Urine (Qualitative)

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

This test detects the presence of *Streptococcus pneumoniae* (pneumococcal) bacteria in your urine, which may indicate pneumonia or other infections caused by this organism.

Quick summary

["The test helps identify possible pneumonia infections quickly, especially in high-risk groups."]

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

Key facts at a glance

LOINC
88264-7
Short code
K pneumoniae yggE Bld Pos Ql Probe
Synonyms
K pneumoniae yggE Bld Pos Ql Probe
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like fever, cough, difficulty breathing, or other signs of pneumonia. It’s particularly useful for diagnosing infections in people with weakened immune systems, chronic lung conditions, or those who’ve recently been exposed to pneumococcal bacteria.

How the Test Works

The test uses a urine sample to detect specific antigens (proteins) from *Streptococcus pneumoniae*. If the bacteria are present, the test can confirm infection without needing a blood or sputum culture, which can take longer.

Sample Collection

You’ll provide a clean-catch urine sample (midstream) or a timed urine collection (if needed). The sample is tested immediately or sent to a lab for analysis.

What to Expect

Results are typically available within hours. A positive result means the test detected pneumococcal antigens, which may require further medical evaluation or treatment with antibiotics targeting *Streptococcus pneumoniae*.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A positive result strongly suggests a pneumococcal infection, which can cause serious lung infections (pneumonia), bloodstream infections, or meningitis. Early identification allows for prompt antibiotic treatment to reduce complications. A negative result means no detectable antigens were found, but other causes of symptoms (like viral infections) could still be present.

Short name

Urine Pneumococcal Antigen Test

Frequently asked questions

How long does it take to get results?
Results are usually available within 1–4 hours, depending on lab processing. Your provider will discuss the timing with you before the test.
Can I drink water before the test?
Yes, you can drink water as usual unless instructed otherwise. Avoid excessive fluids that might dilute the sample if a timed collection is required.
What if I have a urinary tract infection (UTI) instead?
A UTI won’t interfere with this test, as it specifically looks for pneumococcal antigens. If you have symptoms of a UTI, your provider may recommend additional testing to rule out other causes.
  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