Abstract
The performance of Bruker Biotyper matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) in identifying species of nontuberculous mycobacteria (NTM) in flagged Mycobacteria Growth Indicator Tubes (MGIT)s is unclear. A total of 92 sequential MGIT-positive nontuberculous mycobacteria isolates, including Mycobacterium intracellulare, M. abscessus complex, M. avium complex and M. avium, were used to compare the performance of the MALDI-TOF MS for species-level identification with that of the BluePoint MycoID plus kit and final identification. A total of 44 (47.8%) and 80 (87.0%) isolates were correctly identified to the species level by the MALDI-TOF MS and BluePoint MycoID plus kit, respectively. The procedure of MALDI-TOF MS in MGITs inoculated with clinical specimens is needed to be further optimized.
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