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  • Title: In-house method for direct bacterial identification in positive blood culture broths using microfiltration, bead beating, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.
    Author: Ko YJ, Kook JK, Lee CK.
    Journal: J Microbiol Methods; 2021 Jan; 180():106065. PubMed ID: 32961240.
    Abstract:
    Rapid identification of bacterial pathogens facilitates earlier optimization of antibiotic treatment and reduces morbidity and mortality in sepsis patients. The aim of this research was to design an in-house chemical-free method for direct bacterial identification in positive blood culture (BC) broths and to compare the performance of this method with that of the commercial Sepsityper® kit. The overall species identification rates for the in-house and Sepsityper methods were 88.4% and 85.8%, respectively (n = 190). Among 146 facultative anaerobes, 92.5% and 95.9% were identified to the species level using the in-house and Sepsityper methods, respectively. For 32 anaerobic bacteria, the in-house method showed a higher species identification rate (75.0%) than the Sepsityper method (53.1%). The in-house method correctly identified more Bacteroides species (100.0%) than the Sepsityper method (18.2%). Our novel in-house method and the Sepsityper method showed a high accuracy for direct bacterial identification in positive BC broths using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.
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