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Pneumococcal Antigen in Nasopharyngeal Secretions (Detected via Immunoassay)

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

This test checks for the presence of *Streptococcus pneumoniae* bacteria in your throat or nasal passages using a simple swab. It helps quickly identify if you may have pneumonia caused by this common bacterial infection.

Quick summary

["A fast way to spot pneumococcal infection, often used in high-risk patients or after exposure to pneumonia-causing germs."]

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

Key facts at a glance

LOINC
101296-2
Short code
M pneumo DNA Throat Ql NAA+n-prb
Synonyms
M pneumo DNA Throat Ql NAA+n-prb
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
non-probe-amp-tar
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 Matters

Pneumococcal bacteria can cause serious illnesses like pneumonia, ear infections, or meningitis. This test helps doctors determine if you need urgent treatment with antibiotics, especially if you’re at higher risk (e.g., young children, elderly adults, or those with weakened immune systems).

How the Test Works

A healthcare provider collects a swab from your throat or nose. The swab is then tested in a lab using an immunoassay method, which detects specific proteins from the bacteria. Results are usually available within hours.

When You Might Need This Test

Your doctor may recommend this test if you’ve had recent symptoms like high fever, cough, trouble breathing, or chest pain—especially if you’ve been exposed to someone with pneumonia. It’s also used in certain high-risk groups, like newborns or people with chronic health conditions.

What to Expect Before or After

No special preparation is needed. The swab is quick and painless. Afterward, you may have mild throat irritation, but this usually goes away quickly. If you’re prescribed antibiotics, take them as directed to help clear the infection.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Pneumococcal Nasopharyngeal Antigen Test

Frequently asked questions

How soon can I expect results?
Results are typically ready within 1 to 3 hours, depending on lab processing. Your doctor will discuss them with you during your visit.
What does a positive result mean?
A positive result means the test detected *Streptococcus pneumoniae* bacteria in your throat or nose. This suggests you may have an infection that could cause pneumonia or other serious illnesses. Your doctor will guide you on next steps, which may include antibiotics or further testing.
Can I still get treated if results are pending?
Yes, if symptoms are severe (like difficulty breathing or high fever), your doctor may start antibiotics immediately while waiting for results. This helps prevent complications until the test confirms or rules out the infection.
  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