Development of one-tube multiplex polymerase chain reaction (PCR) for detecting Mycobacterium bovis

A multiplex PCR (m-PCR) with primers targeting the 16S rRNA, Rv3873 and a 12.7-kb fragment in the genomes of a Mycobacterium tuberculosis complex was designed for the differential diagnosis of M. tuberculosis, M. bovis, M. bovis BCG and non-tuberculosis Mycobacterium (NTM). The specificity of this assay was 100%, and the detection limit was 15 pg of genomic DNA. Of the 206 blinded clinical samples, the detection rate of M. bovis infection by m-PCR was lower than that of the interferon gamma (IFN-γ) release assay; however, the false-positive rate by the tuberculin skin test and false-negative samples in the IFN-γ release assay were reduced. Our findings indicated that our m-PCR method is a useful tool for complementation to differentiate M. bovis from M. tuberculosis and NTM species.

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