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Neutrophil Antibody in Serum (Pneumococcal Antibody Screening)

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

This test checks for antibodies against pneumococcal bacteria, which can help identify past exposure or immune response to these common causes of pneumonia, meningitis, or other infections.

Quick summary

["Assesses immune response to pneumococcal bacteria for infection risk or prior exposure."]

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

Key facts at a glance

LOINC
7969-9
Short code
M pneumo Ab Ser-aCnc
Synonyms
M pneumo Ab Ser-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Might Be Ordered

Your doctor may recommend this test if you’ve had recent symptoms of pneumonia, sinus infections, or other respiratory illnesses, or if you’re at higher risk for infections due to conditions like diabetes, weakened immune system, or living in a long-term care facility. It can also be part of screening for certain immune-related conditions.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The blood is processed to separate serum, which is then tested for specific antibodies.

What the Results Mean

Positive results suggest your body has produced antibodies against pneumococcal bacteria, indicating either prior infection or vaccination. Negative results mean no detectable antibodies at this time, but this doesn’t rule out past exposure.

Common Reasons for Testing

This screening is often used to guide vaccination decisions (e.g., pneumococcal vaccine) or to monitor immune function in patients with chronic illnesses or immune deficiencies.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Pneumococcal Antibody Screen

Frequently asked questions

What does a positive result mean?
A positive result indicates your immune system has detected and responded to pneumococcal bacteria, which could mean you’ve had an infection in the past or are vaccinated. It doesn’t confirm current infection but may guide vaccination decisions.
Can I get this test at home?
No, this test requires a blood sample collected by a healthcare professional in a clinical setting. Home blood tests for antibodies are not standard for this specific test.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your doctor will discuss the findings with you during your follow-up visit.
  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