Biomarker Reference · Dysbiosis Index

What does the Microbiome Abundance and Dysbiosis Index (qPCR relative abundance of keystone/commensal organisms with a proprietary composite score) test measure?

Q: What is the reference range for Microbiome Abundance and Dysbiosis Index (qPCR relative abundance of keystone/commensal organisms with a proprietary composite score)?

The standard reference range for Microbiome Abundance and Dysbiosis Index (qPCR relative abundance of keystone/commensal organisms with a proprietary composite score) is Relative abundance of selected organisms and a composite Dysbiosis Index reported against the laboratory's reference population. Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Microbiome Abundance and Dysbiosis Index (qPCR relative abundance of keystone/commensal organisms with a proprietary composite score) (Dysbiosis Index) is a clinical biomarker used in gastrointestinal assessment. This component quantifies selected keystone and commensal organisms by qPCR and combines them into a composite index benchmarked against a reference population intended to represent a healthy gut community. It is measured in 1 laboratory test on BiomarkersLabs.com.

Reference Range: Relative abundance of selected organisms and a composite Dysbiosis Index reported against the laboratory's reference population
Units: relative abundance, index score
Measured In: 1 test
Category: Gastrointestinal

Functional medicine optimalNo validated 'optimal' index value applies; interpreted only relative to the reference population within the algorithm's limits

What is Microbiome Abundance and Dysbiosis Index (qPCR relative abundance of keystone/commensal organisms with a proprietary composite score)?

This component quantifies selected keystone and commensal organisms by qPCR and combines them into a composite index benchmarked against a reference population intended to represent a healthy gut community. It assesses a defined panel of organisms rather than the full microbiome, and is not equivalent to shotgun metagenomic sequencing.

Why is Microbiome Abundance and Dysbiosis Index (qPCR relative abundance of keystone/commensal organisms with a proprietary composite score) measured?

Quantitative measurement of selected taxa is more reliable than culture for those specific targets. However, the composite Dysbiosis Index is a proprietary score whose clinical validity for diagnosing 'dysbiosis' or directing treatment is not established, and it should be read as a deviation flag relative to a reference group rather than a diagnosis. It must not be used in isolation to justify probiotic or antimicrobial regimens.

Reference ranges

Standard reference: Relative abundance of selected organisms and a composite Dysbiosis Index reported against the laboratory's reference population
Functional medicine optimal: No validated 'optimal' index value applies; interpreted only relative to the reference population within the algorithm's limits
Units: relative abundance, index score

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

Tests that measure Microbiome Abundance and Dysbiosis Index (qPCR relative abundance of keystone/commensal organisms with a proprietary composite score)

1 test on BiomarkersLabs.com include this biomarker.

BML-GAS-005Comprehensive

GI360 (Comprehensive Molecular Stool Profile)

Microbiome Abundance and Dysbiosis Index (qPCR relative abundance of keystone/commensal organisms with a proprietary composite score) reference range in this test: Relative abundance of selected organisms and a composite Dysbiosis Index reported against the laboratory's reference population

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Molecular Gastrointestinal Pathogen Detection (multiplex PCR/qPCR — bacterial, parasitic, and viral targets)Molecular Pathogens1 test Digestion and Absorption Markers (pancreatic elastase-1 and products of digestion)Digestion/Absorption1 test Gut Inflammation and Immunology Markers (calprotectin, secretory IgA, eosinophil protein X)Inflammation/Immunology1 test Gut Metabolic Markers (short-chain fatty acids, beta-glucuronidase, faecal pH)Gut Metabolic1 test Culture, Mycology, and Parasitology (MALDI-TOF-identified culture with susceptibilities, yeast/fungi, and microscopic ova-and-parasite examination with immunoassays)Culture/Mycology/Parasitology1 test

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