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A robust SNP barcode for typing Mycobacterium tuberculosis complex strains
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A robust SNP barcode for typing Mycobacterium tuberculosis complex strains
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Journal Article
A robust SNP barcode for typing Mycobacterium tuberculosis complex strains
2014
Overview
Strain-specific genomic diversity in the
Mycobacterium tuberculosis
complex (MTBC) is an important factor in pathogenesis that may affect virulence, transmissibility, host response and emergence of drug resistance. Several systems have been proposed to classify MTBC strains into distinct lineages and families. Here, we investigate single-nucleotide polymorphisms (SNPs) as robust (stable) markers of genetic variation for phylogenetic analysis. We identify ~92k SNP across a global collection of 1,601 genomes. The SNP-based phylogeny is consistent with the gold-standard regions of difference (RD) classification system. Of the ~7k strain-specific SNPs identified, 62 markers are proposed to discriminate known circulating strains. This SNP-based barcode is the first to cover all main lineages, and classifies a greater number of sublineages than current alternatives. It may be used to classify clinical isolates to evaluate tools to control the disease, including therapeutics and vaccines whose effectiveness may vary by strain type.
Genetic variation in
Mycobacterium tuberculosis
complex (MTBC) bacteria is responsible for differences in factors such as virulence and transmissibility. Here, the authors analyse the genomes of 1,601 MTBC isolates from diverse geographic locations and identify 62 SNPs that may be used to resolve lineages and sublineages of these strains.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Pub. Group
