What question did this study set out to answer?

To identify specific genetic mutations in the katG and rpoB genes that confer resistance to isoniazid and rifampin in clinical Mycobacterium tuberculosis isolates.

September 1, 1998Antimicrobial Agents and ChemotherapyOpen Access

A Ser315Thr Substitution in KatG Is Predominant in Genetically Heterogeneous Multidrug-Resistant Mycobacterium tuberculosis Isolates Originating from the St. Petersburg Area in Russia

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Authors

HMHarri MarttilaTurku University Hospital HSHanna SoiniFinnish Institute for Health and Welfare EEErkki EerolaUniversity of Turku

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Implication

Genomic analysis reveals high rates of KatG and RpoB mutations in multidrug-resistant tuberculosis isolates, indicating widespread independent resistance development.

Key Points

To identify specific genetic mutations in the katG and rpoB genes that confer resistance to isoniazid and rifampin in clinical Mycobacterium tuberculosis isolates.
Sequenced targeted regions of the katG and rpoB genes across 27 Russian Mycobacterium tuberculosis isolates.
Conducted IS6110 restriction fragment length polymorphism fingerprinting to determine the genetic diversity and clonal relatedness of the bacterial strains.
All 24 isoniazid-resistant isolates carried mutations in katG, with 91.7% (22/24) harboring the specific Ser315Thr amino acid substitution.
Mutations in rpoB were detected in 100% of the 21 rifampin-resistant isolates, with Ser531Leu representing the most frequent substitution.
Only two isolates shared identical IS6110 fingerprint patterns, demonstrating substantial genetic heterogeneity among the resistant strains.

Cite This Study

Marttila et al. (1998) studied this question.

synapsesocial.com/papers/6a8cf0048a9f77207c301ce0 https://doi.org/10.1128/aac.42.9.2443

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Implication

Genomic analysis reveals high rates of KatG and RpoB mutations in multidrug-resistant tuberculosis isolates, indicating widespread independent resistance development.

A Ser315Thr Substitution in KatG Is Predominant in Genetically Heterogeneous Multidrug-Resistant Mycobacterium tuberculosis Isolates Originating from the St. Petersburg Area in Russia

Discussion

Member takes

Implication

Key Points

Cite This Study

A Ser315Thr Substitution in KatG Is Predominant in Genetically Heterogeneous Multidrug-Resistant Mycobacterium tuberculosis Isolates Originating from the St. Petersburg Area in Russia

Discussion

Member takes

Implication

Key Points

Cite This Study

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