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Rapid Identification of Bacteria in Positive Blood Culture Broths by Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry
Open accessAbstract
Matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry is a rapid, accurate method for identifying bacteria and fungi recovered on agar culture media. We report herein a method for the direct identification of bacteria in positive blood culture broths by MALDI-TOF mass spectrometry. A total of 212 positive cultures were examined, representing 32 genera and 60 species or groups. The identification of bacterial isolates by MALDI-TOF mass spectrometry was compared with biochemical testing, and discrepancies were resolved by gene sequencing. No identification (spectral score of <1.7) was obtained for 42 (19.8%) of the isolates, due most commonly to insufficient numbers of bacteria in the blood culture broth. Of the bacteria with a spectral score of ≥1.7, 162 (95.3%) of 170 isolates were correctly identified. All 8 isolates of Streptococcus mitis were misidentified as being Streptococcus pneumoniae isolates. This method provides a rapid, accurate, definitive identification of bacteria within 1 h of detection in positive blood cultures with the caveat that the identification of S. pneumoniae would have to be confirmed by an alternative test.
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Seng, P., Drancourt, M., Gouriet, F., La Scola, B., Fournier, P., Rolain, J. M., & Raoult, D. (2009) · Clinical Infectious Diseases · doi:10.1086/600885 · Cited by 1,983 · cited 2×
“7, an observation previously reported for tests performed by using isolated colonies (14).”
Background
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Seng, P., Abat, C., Rolain, J. M., Colson, P., Lagier, J.-C., Gouriet, F., Fournier, P. E., Drancourt, M., La Scola, B., & Raoult, D. (2013) · Journal of Clinical Microbiology · doi:10.1128/jcm.00492-13 · Cited by 438
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van Belkum, A., Welker, M., Erhard, M., & Chatellier, S. (2012) · Journal of Clinical Microbiology · doi:10.1128/jcm.00420-12 · Cited by 100
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Metadata
- Authors
- Stevenson, L. G., Drake, S. K., & Murray, P. R.
- Venue
- Journal of Clinical Microbiology
- Publisher
- American Society for Microbiology
- Published
- 2010-02
- Volume
- 48
- Issue
- 2
- Pages
- 444-447
- ISSN
- 0095-1137 (ISSN-L)
- 1098-660X
- OpenAlex
- W2026560502
- Cited by
- 424
- References
- 1
- FWCI
- 25.25
- Type
- journal article
- Language
- en
- Open access
- green
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- Stevenson, L. G., Drake, S. K., & Murray, P. R. (2010). Rapid Identification of Bacteria in Positive Blood Culture Broths by Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry. Journal of Clinical Microbiology. https://doi.org/10.1128/jcm.01541-09
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