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Chlamydia IgG Antibody in Fluid (Serum/Plasma)

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

This test detects antibodies to *Chlamydia trachomatis*, a common bacterial infection that can affect the reproductive system, respiratory tract, or eyes. It helps identify past exposure rather than an active infection.

Quick summary

["This test checks for immunity from past *Chlamydia* infection, not current illness."]

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

Key facts at a glance

LOINC
38467-7
Short code
Chlamydia IgG Fld Ql
Synonyms
Chlamydia IgG Fld Ql
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?

Your doctor may order this test if you have symptoms like unusual discharge, pain during urination, or if you’ve been exposed to *Chlamydia*. It’s also used in screening for sexually transmitted infections (STIs) in certain populations.

What to Expect

A blood sample is taken from a vein in your arm. The fluid is sent to a lab where antibodies to *Chlamydia* are measured using an immunoassay method. Results are typically available within 2–5 business days.

What the Results Mean

A positive result means your body has produced antibodies against *Chlamydia*, suggesting past infection. A negative result means no detectable antibodies were found at this time. Follow-up testing may be needed for active infection.

When to Follow Up

If you have symptoms of an STI or recent exposure, discuss your results with your healthcare provider. They may recommend retesting or additional tests to check for active infection.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Chlamydia IgG Antibodies Serology plays a role in diagnosing past exposure to *Chlamydia trachomatis*, which can cause complications like pelvic inflammatory disease, infertility, or chronic pelvic pain. While IgG antibodies indicate immunity, they do not confirm current infection. Active infection is typically diagnosed with nucleic acid amplification tests (NAATs) or culture.

Short name

IgG Antibody to Chlamydia

Frequently asked questions

How long does it take to get results from this test?
Results are usually available within 2–5 business days, depending on your lab’s processing time.
Can I have a false-positive result?
Rarely. False positives are uncommon with this test, but they can occur if you’ve been previously exposed or have other infections. Your doctor will interpret results in the context of your medical history and symptoms.
Does this test show if I have an active *Chlamydia* infection?
No. This test only detects past exposure through antibodies. For active infection, your doctor may recommend additional tests like urine or swab 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