Chlamydia IgG Antibody Detection by Immunoassay (Serum/Plasma)
This test measures the presence of antibodies in your blood that your immune system produces in response to the Chlamydia bacterium, a common sexually transmitted infection.
["Detects past or ongoing Chlamydia infection through antibody presence."]
Key facts at a glance
- LOINC
- 110991-7
- Short code
- Chlamydia IgG Msmt Ser
- Synonyms
- Chlamydia IgG Msmt 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 Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms of a sexually transmitted infection (STI), such as unusual discharge, pain during urination, or pelvic pain. It may also be used as part of routine screening for sexually active individuals at higher risk of infection, 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, typically drawn from a vein in your arm. The test is usually done in a lab setting and results are ready within a few days.
What the Test Results Mean
A positive result indicates your body has produced IgG antibodies to Chlamydia, suggesting you’ve been infected at some point. A negative result means no detectable antibodies were found, but this doesn’t rule out past infection without current symptoms.
Common Causes of False Results
False negatives can occur if the infection was recent or cleared quickly. False positives are rare but may happen if you have other infections or autoimmune conditions that trigger similar antibody responses.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Chlamydia is a bacterial infection that can lead to serious health issues if untreated, including pelvic inflammatory disease (PID), chronic pelvic pain, and infertility in women. In men, it can cause epididymitis or urethritis. Early detection and treatment with antibiotics can prevent complications and reduce transmission risk.
Short name
IgG Antibody to Chlamydia (Serum/Plasma)
Frequently asked questions
How long does it take to get results from this test?
Can I have a second opinion on my test results?
Do I need to take any antibiotics before or after this test?
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