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Updated: Jun 18, 2026

Identification of Mycobacterium Species by DNA Microarray Chip Method

Identification of Mycobacterium Species by DNA Microarray Chip Method

Published on: June 24, 2025

Genotyping of Mycobacterium avium complex organisms using multispacer sequence typing.

Caroline Cayrou¹, Christine Turenne², Marcel A Behr²

¹Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes, UMR CNRS 6236 IRD 3R198, IFR 48 Faculté de Médecine, Université de la Méditerranée, Marseille, France.

Microbiology (Reading, England)

|November 21, 2009

Summary

A new multispacer sequence typing (MST) method was developed for Mycobacterium avium complex (MAC) genotyping. This sequencing-based approach accurately differentiates all eight MAC species, improving understanding of these opportunistic pathogens.

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Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray

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Published on: April 25, 2014

Area of Science:

Microbiology
Genetics
Infectious Diseases

Background:

Mycobacterium avium complex (MAC) includes eight species of slowly-growing mycobacteria.
MAC organisms cause opportunistic infections in humans, but their epidemiology is poorly understood.
A lack of a universal genotyping method hinders MAC research.

Purpose of the Study:

To develop a novel, sequencing-based genotyping method for all eight species of Mycobacterium avium complex.
To enable accurate differentiation and typing of MAC organisms for epidemiological studies.

Main Methods:

Developed multispacer sequence typing (MST) by selecting and analyzing intergenic spacers from MAC genomes.
Selected 16 intergenic spacers (300-800 bp) with variable bases.
Optimized MST using four PCR-amplified and sequenced spacers.

Main Results:

MST successfully genotyped 106 MAC isolates, including all eight species.
The method identified 45 distinct spacer types with a high index of discrimination (0.94).
Spacer types were species-specific and some were subspecies-specific within M. avium.

Conclusions:

Multispacer sequence typing (MST) is a robust and effective method for genotyping Mycobacterium avium complex.
MST can differentiate all eight MAC species and subspecies of M. avium.
This new genotyping tool will advance the study of MAC epidemiology and infections.