Article (Scientific journals)
Investigation of MALDI-TOF Mass Spectrometry for Assessing the Molecular Diversity of Campylobacter jejuni and Comparison with MLST and cgMLST: A Luxembourg One-Health Study.
Feucherolles, Maureen; Nennig, Morgane; Becker, Sören L et al.
2021In Diagnostics, 11 (11), p. 1949
Peer reviewed
 

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Keywords :
Campylobacter; MALDI-TOF MS; MLST; cgMLST; machine learning; subtyping; Clinical Biochemistry
Abstract :
[en] There is a need for active molecular surveillance of human and veterinary Campylobacter infections. However, sequencing of all isolates is associated with high costs and a considerable workload. Thus, there is a need for a straightforward complementary tool to prioritize isolates to sequence. In this study, we proposed to investigate the ability of MALDI-TOF MS to pre-screen C. jejuni genetic diversity in comparison to MLST and cgMLST. A panel of 126 isolates, with 10 clonal complexes (CC), 21 sequence types (ST) and 42 different complex types (CT) determined by the SeqSphere+ cgMLST, were analysed by a MALDI Biotyper, resulting into one average spectra per isolate. Concordance and discriminating ability were evaluated based on protein profiles and different cut-offs. A random forest algorithm was trained to predict STs. With a 94% similarity cut-off, an AWC of 1.000, 0.933 and 0.851 was obtained for MLSTCC, MLSTST and cgMLST profile, respectively. The random forest classifier showed a sensitivity and specificity up to 97.5% to predict four different STs. Protein profiles allowed to predict C. jejuni CCs, STs and CTs at 100%, 93% and 85%, respectively. Machine learning and MALDI-TOF MS could be a fast and inexpensive complementary tool to give an early signal of recurrent C. jejuni on a routine basis.
Disciplines :
Laboratory medicine & medical technology
Author, co-author :
Feucherolles, Maureen ;  Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology, L-4422 Belvaux, Luxembourg
Nennig, Morgane;  Epidemiology and Microbial Genomics, Laboratoire National de Santé, L-3555 Dudelange, Luxembourg
Becker, Sören L ;  Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany ; Swiss Tropical and Public Health Institute, CH-4002 Basel, Switzerland ; University of Basel, CH-4003 Basel, Switzerland
Martiny, Delphine  ;  Université de Mons - UMONS ; National Reference Centre for Campylobacter, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), 1000 Brussels, Belgium
Losch, Serge;  Laboratoire de Médecine Vétérinaire de l'Etat, L-3555 Dudelange, Luxembourg
Penny, Christian;  Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology, L-4422 Belvaux, Luxembourg ; Cellule Scientifique, Chambre des Députés du Grand-Duché de Luxembourg, L-1728 Luxembourg, Luxembourg
Cauchie, Henry-Michel ;  Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology, L-4422 Belvaux, Luxembourg
Ragimbeau, Catherine ;  Epidemiology and Microbial Genomics, Laboratoire National de Santé, L-3555 Dudelange, Luxembourg
Language :
English
Title :
Investigation of MALDI-TOF Mass Spectrometry for Assessing the Molecular Diversity of Campylobacter jejuni and Comparison with MLST and cgMLST: A Luxembourg One-Health Study.
Publication date :
20 October 2021
Journal title :
Diagnostics
ISSN :
2075-4418
eISSN :
2075-4418
Publisher :
MDPI, Switzerland
Volume :
11
Issue :
11
Pages :
1949
Peer reviewed :
Peer reviewed
Research institute :
Santé
Funders :
Fonds National de la Recherche
Funding text :
Funding: Supported by the Luxembourg National Research fund (FNR): MICROH-DTU FNR PRIDE program (No.11823097).
Available on ORBi UMONS :
since 15 January 2023

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