Simple Sample Preparation Method for Direct Microbial Identification and Susceptibility Testing From Positive Blood Cultures

Autor: Hong-wei Pan, Wei Li, Rong-guo Li, Yong Li, Yi Zhang, En-hua Sun
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Frontiers in Microbiology, Vol 9 (2018)
Druh dokumentu: article
ISSN: 1664-302X
DOI: 10.3389/fmicb.2018.00481
Popis: Rapid identification and determination of the antibiotic susceptibility profiles of the infectious agents in patients with bloodstream infections are critical steps in choosing an effective targeted antibiotic for treatment. However, there has been minimal effort focused on developing combined methods for the simultaneous direct identification and antibiotic susceptibility determination of bacteria in positive blood cultures. In this study, we constructed a lysis-centrifugation-wash procedure to prepare a bacterial pellet from positive blood cultures, which can be used directly for identification by matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF MS) and antibiotic susceptibility testing by the Vitek 2 system. The method was evaluated using a total of 129 clinical bacteria-positive blood cultures. The whole sample preparation process could be completed in
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