What question did this study set out to answer?

To identify pncA gene mutations in pyrazinamide-resistant Mycobacterium tuberculosis isolates and evaluate their relationship with enzymatic activity and phenotypic drug susceptibility.

July 1, 1999Antimicrobial Agents and ChemotherapyOpen Access

pncA Mutations in Pyrazinamide-Resistant Mycobacterium tuberculosis Isolates from Northwestern Russia

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To identify pncA gene mutations in pyrazinamide-resistant Mycobacterium tuberculosis isolates and evaluate their relationship with enzymatic activity and phenotypic drug susceptibility.
Analyzed 36 pyrazinamide-resistant and 8 pyrazinamide-susceptible Mycobacterium tuberculosis isolates from Russia.
Sequenced the pncA coding gene and its upstream promoter region to detect mutations.
Correlated identified genotypes with pyrazinamidase activity assays and BACTEC 460 susceptibility testing.
Identified pncA or upstream promoter mutations in 31 of 36 pyrazinamide-resistant isolates (86.1%).
Detected 23 distinct mutations across the isolates, 20 of which were novel and previously undescribed.
Observed strong correlation between pncA mutations, loss of pyrazinamidase activity, and BACTEC 460 resistance.

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Implication

Molecular analysis reveals extensive novel pncA mutations in resistant Mycobacterium tuberculosis isolates, highlighting genetic sequencing for rapid pyrazinamide susceptibility screening.

Cite This Study

Marttila et al. (1999) studied this question.

synapsesocial.com/papers/6a9a3d8edefad88af8fb519f https://doi.org/10.1128/aac.43.7.1764

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Implication

Molecular analysis reveals extensive novel pncA mutations in resistant Mycobacterium tuberculosis isolates, highlighting genetic sequencing for rapid pyrazinamide susceptibility screening.

pncA Mutations in Pyrazinamide-Resistant Mycobacterium tuberculosis Isolates from Northwestern Russia

Key Points

Discussion

Implication

Cite This Study

pncA Mutations in Pyrazinamide-Resistant Mycobacterium tuberculosis Isolates from Northwestern Russia

Key Points

Discussion

Implication

Cite This Study

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