What is the reference range for Chlamydophila pneumoniae IgG?

The standard reference range for Chlamydophila pneumoniae IgG is Negative 1.10 (index values, assay-dependent).. Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Which tests measure Chlamydophila pneumoniae IgG?

Chlamydophila pneumoniae IgG is measured in 2 tests on BiomarkersLabs.com, including Chlamydophila pneumoniae Antibodies (IgG, IgA, IgM), Chlamydophila pneumoniae Antibodies (IgM, IgG, IgA).

Biomarker Reference · C. pneumoniae IgG

What does the Chlamydophila pneumoniae IgG test measure?

Chlamydophila pneumoniae IgG (C. pneumoniae IgG) is a clinical biomarker used in autoimmune-inflammation assessment. IgG antibodies to C. It is measured in 2 laboratory tests on BiomarkersLabs.com.

Reference Range: Negative <0.90; Equivocal 0.90–1.10; Positive >1.10 (index values, assay-dependent).
Units: Index, titre, Index value
Measured In: 2 tests
Category: Autoimmune

Functional medicine optimalNegative or low-positive index consistent with resolved past exposure and absence of active infection.

What is Chlamydophila pneumoniae IgG?

IgG antibodies to C. pneumoniae appear later than IgM, typically several weeks into infection, and can persist for years after resolution. The organism is highly prevalent, so a substantial proportion of adults harbour detectable IgG from prior asymptomatic or mildly symptomatic exposure. Rising titres between acute and convalescent sera are the traditional serological hallmark of acute infection.

Why is Chlamydophila pneumoniae IgG measured?

A single elevated IgG titre indicates past exposure but does not confirm active disease. A fourfold rise in IgG between paired samples two to four weeks apart is strong evidence of recent infection. Persistent high IgG, especially with elevated IgA, has been explored as a marker of chronic or smouldering infection in cardiovascular and autoimmune research, though clinical consensus remains evolving.

Reference ranges

Standard reference: Negative <0.90; Equivocal 0.90–1.10; Positive >1.10 (index values, assay-dependent).
Functional medicine optimal: Negative or low-positive index consistent with resolved past exposure and absence of active infection.
Units: Index, titre, Index value

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.

Tests that measure Chlamydophila pneumoniae IgG

2 tests on BiomarkersLabs.com include this biomarker.

BML-AUT-019Comprehensive

Chlamydophila pneumoniae Antibodies (IgG, IgA, IgM)

Chlamydophila pneumoniae IgG reference range in this test: Negative <1.0 index; equivocal 1.0–1.09; positive ≥1.10 (assay-specific).

BML-AUT-020Comprehensive

Chlamydophila pneumoniae Antibodies (IgM, IgG, IgA)

Chlamydophila pneumoniae IgG reference range in this test: Negative <0.90; Equivocal 0.90–1.10; Positive >1.10 (index values, assay-dependent).

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Chlamydophila pneumoniae IgAC. pneumoniae IgA2 tests Chlamydophila pneumoniae IgMC. pneumoniae IgM2 tests

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