Maldi-tof ms: A rapid methodology for identifying and subtyping listeria monocytogenes

Snehal R. Jadhav, Rohan M. Shah, Enzo A. Palombo

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

5 Citations (Scopus)

Abstract

Listeria monocytogenes is a major food-borne pathogen and causative agent of a fatal disease, listeriosis. Stringent regulatory guidelines and zero tolerance policy toward this bacterium necessitate rapid, accurate, and reliable methods of identification and subtyping. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF MS) has recently become a method of choice for routine identification of pathogens in clinical settings and has largely replaced biochemical assays. Identification relies on well-curated databases such as SARAMIS. Extensive use of SARAMIS to generate consensus mass spectra, in conjunction with statistical analysis, such as partial least square-discriminant analysis and hierarchical cluster analysis, is useful in subtyping bacteria. While MALDI-ToF MS has been extensively used for pathogen detection, its application in bacterial subtyping has been limited. The protocol describes a MALDI-ToF MS workflow as a single tool for simultaneous identification and subtyping of L. monocytogenes directly from solid culture medium.

Original languageEnglish
Title of host publicationMethods in Molecular Biology
PublisherHumana Press Inc.
Pages17-29
Number of pages13
DOIs
Publication statusPublished - 2021

Publication series

NameMethods in Molecular Biology
Volume2220
ISSN (Print)1064-3745
ISSN (Electronic)1940-6029

Keywords

  • Axima Performance
  • Identification
  • Listeria monocytogenes
  • MALDI-ToF MS
  • MetaboAnalyst
  • SARAMIS
  • SIMCA
  • Subtyping

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