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Chlamydophila pneumoniae Antibody, Immunoassay (Serum/Plasma)

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

This test detects antibodies to *Chlamydophila pneumoniae*, a bacterium linked to respiratory infections and potential heart/lung complications. It helps assess past exposure or immune response.

Quick summary

["This test checks for signs your body may have encountered *Chlamydia pneumoniae* in the past."]

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

Key facts at a glance

LOINC
43846-5
Short code
Chlamydophila Ab Ser-Imp
Synonyms
Chlamydophila Ab Ser-Imp
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 healthcare provider may recommend this test if you’ve had symptoms like persistent cough, chest pain, or fatigue—especially if they suspect long-term lung or heart issues. It’s also used in research or rare cases of chronic infections.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample (usually from your arm) in a lab. Results focus on antibody presence, not active infection.

What the Results Mean

Positive results indicate your immune system has likely encountered *Chlamydia pneumoniae* at some point. Negative results mean no detectable antibodies, suggesting no prior exposure.

Common Uses in Healthcare

This test isn’t routinely used for routine infections but may help diagnose chronic conditions like chronic obstructive pulmonary disease (COPD) or unexplained heart symptoms in certain cases.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Chlamydia pneumoniae Antibody Test

Frequently asked questions

Will this test show if I currently have an infection?
No, this test only detects antibodies—signs your body has encountered the bacterium in the past. For active infections, you’d need a different diagnostic approach.
How long will I need to wait for results?
Results typically arrive within 3–5 business days, depending on lab processing times. Your provider will contact you once available.
Can I take antibiotics before this test?
Yes, you can take antibiotics if prescribed for an active infection. However, they may affect antibody detection, so discuss this with your provider before testing.
  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