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Bacterial Identification by Matrix-Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry


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Bruker Biotyper MALDI TOF Mass Spectrometer versus BD Phoenix Automated Microbiology System Identification of Gram-Negative Bacilli2

Slide 17

February 2012

We studied 440 Gram-negative bacilli. 89% of 440 isolates generated a high confidence score (> 2.0) with direct colony testing. The 11% that did not generate a score of > 2.0 were extracted. Using the BD Phoenix system, 83% were identified to the genus level and 75% to the species level. Using mass spectrometry, 93% were identified to the genus level and 82% to the species level. Statistically, mass spectrometry outperformed the BD Phoenix for identification of Gram-negative bacilli to the genus and species levels.

Bruker Biotyper versus BD Phoenix2


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