What question did this study set out to answer?

To evaluate and compare five repetitive genetic elements for their discriminatory capacity to differentiate clustered strains of Mycobacterium tuberculosis.

August 1, 1993Journal of Clinical MicrobiologyOpen Access

Comparison of various repetitive DNA elements as genetic markers for strain differentiation and epidemiology of Mycobacterium tuberculosis

View Full Paper

Ask AI

Bookmark

To evaluate and compare five repetitive genetic elements for their discriminatory capacity to differentiate clustered strains of Mycobacterium tuberculosis.
Assessed five repetitive genetic elements—IS6110, the 36-bp direct repeat, the polymorphic GC-rich repetitive DNA element, the major polymorphic tandem repeat, and IS1081—for strain differentiation power.
Confirmed the taxonomic classification of an IS6110-deficient isolate as authentic M. tuberculosis using classical taxonomic criteria and 16S rRNA gene sequencing.
Fingerprinting with IS6110 failed to differentiate a large number of M. tuberculosis strains harboring only zero, one, or two copies at the same chromosomal locus.
The 36-bp direct repeat and the polymorphic GC-rich repetitive DNA element successfully differentiated most strains, including those with low IS6110 copy numbers, whereas IS1081 and the major polymorphic tandem repeat offered lower discriminative power.
Identified an authentic M. tuberculosis strain completely lacking IS6110, demonstrating that using this sequence as an exclusive target for diagnostic PCR detection can yield false negatives.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Comparative study reveals alternative repetitive DNA markers differentiate low-copy IS6110 Mycobacterium tuberculosis strains, indicating IS6110 alone is insufficient for tracking.

Cite This Study

Soolingen et al. (1993) studied this question.

synapsesocial.com/papers/6a11cfa71d1aaf8555563570 https://doi.org/10.1128/jcm.31.8.1987-1995.1993

View Full Paper

Ask AI

Bookmark

Implication

Comparative study reveals alternative repetitive DNA markers differentiate low-copy IS6110 Mycobacterium tuberculosis strains, indicating IS6110 alone is insufficient for tracking.

Comparison of various repetitive DNA elements as genetic markers for strain differentiation and epidemiology of Mycobacterium tuberculosis

Key Points

Discussion

Implication

Cite This Study

Comparison of various repetitive DNA elements as genetic markers for strain differentiation and epidemiology of Mycobacterium tuberculosis

Key Points

Discussion

Implication

Cite This Study

Also Consider

Also Consider