Email this article IDENTIFICATION OF LEPTOSPIRA SEROVARS BY MALDI-TOF MASS-SPECTROMETRY
- Authors: Zyeva E.V.1, Stoyanova N.A.1, Tokarevich N.K.1, Totolyan A.A.2
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Affiliations:
- Pasteur Research Institute of Epidemiology and Microbiology
- Pasteur Research Institute of Epidemiology and Microbiology, Pavlov First St. Petersburg State Medical University
- Issue: Vol 94, No 1 (2017)
- Pages: 42-49
- Section: ORIGINAL RESEARCHES
- URL: https://microbiol.crie.ru/jour/article/view/121
- DOI: https://doi.org/10.36233/0372-9311-2017-1-42-49
- ID: 121
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Abstract
Aim. An attempt to use MALDI-TOF mass-spectrometry method for identification of leptospiral isolates on the serovar level. Materials and methods. 8 reference Leptospira spp. and 11 leptospira strains isolated from leptospiral patients and infected animals in the North-VNfestem region of Russia were included into the study. Mass-spectra of all the studied strains were obtained by direct profiling of cell extracts. The created main spectral profiles (MSP) of reference strains were used for identification of isolates. Evaluation of identification was carried out by calculating coefficients of matching rate of separate spectra of each isolate with MSP of all the reference strains. Results. Results of identification have shown the similarity of spectra of isolates belonging to Pomona, Icterohaemorrhagiae and Canicola serogroups, with MSP of saprophyte strain L. biflexa Patoc I. It is assumed that spectra of the studied strains contained peaks of polysaccharide O-antigens. Wherein maximum mean values of matching rate coefficients between spectra of isolates and MSP of pathogenic reference strains of leptospira correctly matched serovar type of the isolate. Conclusion. Further extended studies may form the base of development of a simple and rapid method of typing of leptospirosis causative agents on the level of serovars using MALDI-TOF mass-spectrometry.
About the authors
E. V. Zyeva
Pasteur Research Institute of Epidemiology and Microbiology
Author for correspondence.
Email: noemail@neicon.ru
Russian Federation
N. A. Stoyanova
Pasteur Research Institute of Epidemiology and Microbiology
Email: noemail@neicon.ru
Russian Federation
N. K. Tokarevich
Pasteur Research Institute of Epidemiology and Microbiology
Email: noemail@neicon.ru
Russian Federation
A. A. Totolyan
Pasteur Research Institute of Epidemiology and Microbiology, Pavlov First St. Petersburg State Medical University
Email: noemail@neicon.ru
Russian Federation
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