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[Species identification of Mycobacterium tuberculosis with insertion elements]
Wei Sheng Wu Xue Bao = Acta Microbiologica Sinica
|January 31, 2003
Summary
Insertion Sequence 6110 (IS6110) is an effective tool for differentiating Mycobacterium tuberculosis strains and tracking outbreaks. IS1081 is not suitable for strain typing within the M. tuberculosis complex.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Context:
- Mycobacterium tuberculosis complex strains require precise identification for epidemiological studies.
- Restriction Fragment Length Polymorphism (RFLP) is a molecular technique used for DNA analysis.
- Insertion Sequences (IS) are mobile genetic elements that can vary in copy number and location.
Purpose:
- To evaluate the utility of IS6110 and IS1081 insertion sequences as probes for RFLP-based strain typing of Mycobacterium tuberculosis complex.
- To assess the discriminatory power of IS6110 and IS1081 for distinguishing between M. tuberculosis and M. bovis strains.
Summary:
- IS6110 and IS1081 were used as probes in RFLP analysis of Mycobacterium tuberculosis complex DNA digested with various restriction enzymes.
- IS1081 proved ineffective for strain typing, while IS6110 successfully differentiated strains into broad groups.
- IS6110 RFLP analysis of 46 isolates revealed high polymorphism and multiple copies (7-18) of IS6110 in M. tuberculosis strains, highlighting its epidemiological value.
Impact:
- IS6110 RFLP is established as a valuable tool for epidemiological surveillance and outbreak investigation of tuberculosis.
- The findings underscore the importance of IS6110 in understanding the genetic diversity and population structure of M. tuberculosis.
- This study provides a foundation for using IS6110-based RFLP in clinical and public health settings for tuberculosis control.