Exploring the MALDI Biotyper for the Identification of Corynebacterium pseudotuberculosis biovar Ovis and Equi

RG Santos, N Seyffert, EMS Dorneles… - Journal of the …, 2022 - ACS Publications
RG Santos, N Seyffert, EMS Dorneles, ERGR Aguiar, CP Ramos, DJ Haas, GBN Assis…
Journal of the American Society for Mass Spectrometry, 2022ACS Publications
Biochemical, serological, and molecular methods have been developed for the laboratory
diagnosis of diseases caused by C. pseudotuberculosis (CP), but the identification of the
pathogen and biovars differentiation may be time-consuming, expensive, and confusing
compared with other bacteria. This study aimed to evaluate MALDI Biotyper and Overall
Genome Relatedness Index (OGRI) analysis to optimize the identification and differentiation
of biovars of C. pseudotuberculosis. Out of 230 strains isolated from several hosts and …
Biochemical, serological, and molecular methods have been developed for the laboratory diagnosis of diseases caused by C. pseudotuberculosis (CP), but the identification of the pathogen and biovars differentiation may be time-consuming, expensive, and confusing compared with other bacteria. This study aimed to evaluate MALDI Biotyper and Overall Genome Relatedness Index (OGRI) analysis to optimize the identification and differentiation of biovars of C. pseudotuberculosis. Out of 230 strains isolated from several hosts and countries, 202 (87.8%) were precisely classified using MALDI Biotyper and the BioNumerics platform. The classification accuracies for the Ovis and Equi biovars were 80 (88.75%) and 82 (92.68%), respectively. When analyzing a sampling of these strains by Average Nucleotide Identity based on BLAST and TETRA analyses using genomic sequence data, it was possible to differentiate 100% of the strains in Equi and Ovis. Our data show that MALDI Biotyper and OGRI analysis help identify C. pseudotuberculosis at the species and biovar levels.
ACS Publications
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