Using Vitek MALDI-TOF mass spectrometry to identify species belonging to the Acinetobacter calcoaceticus–Acinetobacter baumannii complex: a relevant alternative to molecular biology? - Centre de recherche en cancérologie Nantes-Angers Unité Mixte de Recherche 892 Inserm - 6299 CNRS Accéder directement au contenu
Article Dans Une Revue Diagnostic Microbiology and Infectious Disease Année : 2015

Using Vitek MALDI-TOF mass spectrometry to identify species belonging to the Acinetobacter calcoaceticus–Acinetobacter baumannii complex: a relevant alternative to molecular biology?

Résumé

Acinetobacter baumannii belongs to the Acinetobacter calcoaceticus-baumannii complex (Acb) containing 2 other pathogenic species: Acinetobacter pittii and Acinetobacter nosocomialis. Identification of these bacteria remains problematic despite the use of matrix-assisted laser ionization time-of-flight mass spectrometry (MALDI-TOF MS). Here, we enriched the SARAMIS™ database of the Vitek MS® plus mass spectrometer to improve the identification of species of the Acb complex. For each species, we incremented reference spectra. Then, a SuperSpectrum was created based on the selection of 40 specific masses. In a second step, we validated reference spectra and SuperSpectra with 100 isolates identified by rpoB gene sequencing. All the isolates were correctly identified by MALDI-TOF MS with the database we created as compared to the identifications obtained by rpoB sequencing. Our database enabled rapid and reliable identification of the pathogen species belonging to the Acb complex. Identification by MALDI-TOF MS with our database is a good alternative to molecular biology.
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Dates et versions

inserm-01817635 , version 1 (18-06-2018)

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Hélène Pailhories, Sophie Daure, Matthieu Eveillard, Marie Joly-Guillou, Marie Kempf. Using Vitek MALDI-TOF mass spectrometry to identify species belonging to the Acinetobacter calcoaceticus–Acinetobacter baumannii complex: a relevant alternative to molecular biology?. Diagnostic Microbiology and Infectious Disease, 2015, 83 (2), pp.99 - 104. ⟨10.1016/j.diagmicrobio.2015.06.009⟩. ⟨inserm-01817635⟩
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