Chlamydia IgA Antibody, Serum
This test measures the presence of Immunoglobulin A (IgA) antibodies against Chlamydia, a common sexually transmitted bacterial infection.
["Detects past or current Chlamydia infection through IgA antibodies in your blood."]
Key facts at a glance
- LOINC
- 43063-7
- Short code
- Chlamydia IgA Titr Ser
- Synonyms
- Chlamydia IgA Titr Ser
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- 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
IgA antibodies are part of your immune system’s response to Chlamydia. This test helps identify if your body has been exposed to the bacteria, which can occur even if you don’t have symptoms. It’s often used alongside other tests to confirm infection, especially in cases where symptoms are unclear or if you’ve been exposed to Chlamydia.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test is quick and typically done in a lab setting. If you’re pregnant, inform your healthcare provider before the test, as some infections like Chlamydia can affect pregnancy outcomes.
What the Results Mean
Positive results suggest your body has produced IgA antibodies against Chlamydia, indicating past or current infection. Negative results mean no detectable IgA antibodies were found, but this doesn’t always rule out infection—other tests may be needed for confirmation. Your healthcare provider will interpret results in the context of your medical history and symptoms.
Common Reasons for This Test
Healthcare providers may order this test if you have symptoms of Chlamydia (such as unusual discharge, pain during urination, or pelvic pain), if you’ve been sexually active with multiple partners, or if you’ve been exposed to Chlamydia. It’s also used as part of routine screening for sexually transmitted infections (STIs) in certain groups.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
IgA Antibody to Chlamydia
Frequently asked questions
Early detection of Chlamydia is crucial because untreated infections can lead to serious health problems, including pelvic inflammatory disease (PID), infertility, or chronic pelvic pain. IgA antibodies can linger in your system for months or years after infection, so this test helps track past exposure even if symptoms have resolved.
IgA antibodies are part of your immune response and may not always correlate perfectly with active infection. If you have symptoms or a suspected STI, follow-up testing with your healthcare provider is important.
How often should I get this test if I’ve had Chlamydia before?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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