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. 1996 May;34(5):1108–1113. doi: 10.1128/jcm.34.5.1108-1113.1996

Evaluation of mtp40 genomic fragment amplification for specific detection of Mycobacterium tuberculosis in clinical specimens.

E A Herrera 1, M Segovia 1
PMCID: PMC228964  PMID: 8727885

Abstract

A PCR assay based on the species-specific mtp40 genomic fragment was developed for the specific detection and identification of Mycobacterium tuberculosis in different uncultured clinical specimens. The aim of the study was to evaluate the clinical applicability of this target DNA in comparison with those of conventional microbiological methods and to compare the results obtained with those obtained after amplification with the IS6110 repetitive element. Discrepant results were interpreted in conjunction with the patients' clinical data, medical histories, and response to therapy. A total of 172 specimens from 162 patients with respiratory symptoms were tested, 101 specimens were obtained from 92 patients clinically suspected of having tuberculosis, and 71 specimens were obtained from 70 patients without known mycobacterial infection. The results of our study suggest that PCR amplification with the mtp40 genomic fragment provides a highly sensitive and specific technique for the detection of M. tuberculosis strains in clinical samples. It allows for the differentiation between M. tuberculosis and other related mycobacteria, including M. bovis, and is more specific than the IS6110 target. For these and other reasons, we propose that the mtp40 assay is a possible alternative for the specific direct detection of M. tuberculosis in clinical laboratories.

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Selected References

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