What is the reference range for Anti-CBir1 Flagellin IgG?

The standard reference range for Anti-CBir1 Flagellin IgG is Laboratory-specific; typically <50 AU negative, ≥50 AU positive.. Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Which tests measure Anti-CBir1 Flagellin IgG?

Anti-CBir1 Flagellin IgG is measured in 1 test on BiomarkersLabs.com, including Add-On Celiac, IBS, and Crohn's Assay (CICA).

Biomarker Reference · anti-CBir1

What does the Anti-CBir1 Flagellin IgG test measure?

Q: What is Anti-CBir1 Flagellin IgG?

CBir1 is a bacterial flagellin derived from commensal gut flora. Antibodies to CBir1 are markers of a loss of tolerance to flagellated intestinal bacteria and are seen predominantly in Crohn's disease, correlating with complicated, fibrostenotic, and perforating phenotypes. The presence of anti-CBir1 antibodies implies that bacterial antigens drive part of the mucosal immune response in susceptible individuals.

Q: Why is Anti-CBir1 Flagellin IgG measured?

Anti-CBir1 is not a diagnostic test for Crohn's disease on its own, but it adds prognostic information: positivity is associated with more aggressive disease, higher risk of surgical intervention, and complicated behaviour. It may help practitioners identify patients who warrant closer monitoring or earlier escalation of therapy.

Q: Which tests measure Anti-CBir1 Flagellin IgG?

Anti-CBir1 Flagellin IgG is measured in 1 test on BiomarkersLabs.com, including Add-On Celiac, IBS, and Crohn's Assay (CICA).

Anti-CBir1 Flagellin IgG (anti-CBir1) is a clinical biomarker used in gastrointestinal assessment. CBir1 is a bacterial flagellin derived from commensal gut flora. It is measured in 1 laboratory test on BiomarkersLabs.com.

Reference Range: Laboratory-specific; typically <50 AU negative, ≥50 AU positive.
Units: Arbitrary units (AU)
Measured In: 1 test
Category: Gastrointestinal

Functional medicine optimalNegative (laboratory-specific threshold) in the absence of Crohn's disease or complicated inflammatory bowel disease.

What is Anti-CBir1 Flagellin IgG?

CBir1 is a bacterial flagellin derived from commensal gut flora. Antibodies to CBir1 are markers of a loss of tolerance to flagellated intestinal bacteria and are seen predominantly in Crohn's disease, correlating with complicated, fibrostenotic, and perforating phenotypes. The presence of anti-CBir1 antibodies implies that bacterial antigens drive part of the mucosal immune response in susceptible individuals.

Why is Anti-CBir1 Flagellin IgG measured?

Anti-CBir1 is not a diagnostic test for Crohn's disease on its own, but it adds prognostic information: positivity is associated with more aggressive disease, higher risk of surgical intervention, and complicated behaviour. It may help practitioners identify patients who warrant closer monitoring or earlier escalation of therapy.

Reference ranges

Standard reference: Laboratory-specific; typically <50 AU negative, ≥50 AU positive.
Functional medicine optimal: Negative (laboratory-specific threshold) in the absence of Crohn's disease or complicated inflammatory bowel disease.
Units: Arbitrary units (AU)

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

Tests that measure Anti-CBir1 Flagellin IgG

1 test on BiomarkersLabs.com include this biomarker.

BML-GAS-053Comprehensive

Add-On Celiac, IBS, and Crohn's Assay (CICA)

Anti-CBir1 Flagellin IgG reference range in this test: Laboratory-specific; typically <50 AU negative, ≥50 AU positive.

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Anti-Tissue Transglutaminase IgGanti-tTG IgG1 test Anti-Tissue Transglutaminase IgAanti-tTG IgA1 test Anti-Saccharomyces cerevisiae IgGASCA IgG1 test Anti-Saccharomyces cerevisiae IgAASCA IgA1 test

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