Genetic markers, genotyping methods & next generation sequencing in Mycobacterium tuberculosis

被引:16
作者
Desikan, Srinidhi [1 ]
Narayanan, Sujatha [1 ]
机构
[1] Natl Inst Res TB ICMR, Dept Immunol, Madras 600031, Tamil Nadu, India
关键词
DNA typing; genetic markers; molecular epidemiology; next generation sequencing; DRUG-RESISTANT TUBERCULOSIS; MOLECULAR EPIDEMIOLOGY; PULMONARY TUBERCULOSIS; INSERTION-SEQUENCE; GENOMIC DELETIONS; DNA POLYMORPHISM; COMPLEX STRAINS; DIVERSITY; IDENTIFICATION; OUTBREAK;
D O I
10.4103/0971-5916.160695
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Molecular epidemiology (ME) is one of the main areas in tuberculosis research which is widely used to study the transmission epidemics and outbreaks of tubercle bacilli. It exploits the presence of various polymorphisms in the genome of the bacteria that can be widely used as genetic markers. Many DNA typing methods apply these genetic markers to differentiate various strains and to study the evolutionary relationships between them. The three widely used genotyping tools to differentiate Mycobacterium tuberculosis strains are IS6110 restriction fragment length polymorphism (RFLP), spacer oligotyping (Spoligotyping), and mycobacterial interspersed repeat units - variable number of tandem repeats (MIRU-VNTR). A new prospect towards ME was introduced with the development of whole genome sequencing (WGS) and the next generation sequencing (NGS) methods, where the entire genome is sequenced that not only helps in pointing out minute differences between the various sequences but also saves time and the cost. NGS is also found to be useful in identifying single nucleotide polymorphisms (SNPs), comparative genomics and also various aspects about transmission dynamics. These techniques enable the identification of mycobacterial strains and also facilitate the study of their phylogenetic and evolutionary traits.
引用
收藏
页码:761 / 774
页数:14
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