NDLI: Genotyping Study of Salmonella 4,[5],12:i:- Monophasic Variant of Serovar Typhimurium and Characterization of the Second-Phase Flagellar Deletion by Whole Genome Sequencing

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Genotyping Study of Salmonella 4,[5],12:i:- Monophasic Variant of Serovar Typhimurium and Characterization of the Second-Phase Flagellar Deletion by Whole Genome Sequencing

Content Provider	MDPI
Author	Mar, ía Jesús Grilló Ilargi, Martínez-Ballesteros Arrieta-Gisasola, Ainhoa Atxaerandio-Landa, Aitor Garrido, Victoria Laorden, Lorena Garaizar, Javier Bikandi, Joseba
Copyright Year	2020
Description	After Salmonella Enteritidis and S. Typhimurium, S. 4,[5],12:i:- is the most reported serovar in human clinical cases. During the past 20 years, many tools have been used for its typing and second-phase flagellar deletion characterization. Currently, whole genome sequencing (WGS) and different bioinformatic programs have shown the potential to be more accurate than earlier tools. To assess this potential, we analyzed by WGS and in silico typing a selection of 42 isolates of S. 4,[5],12:i:- and S. Typhimurium with different in vitro characteristics. Comparative analysis showed that SeqSero2 does not differentiate fljB-positive S. 4,[5],12:i:- strains from those of serovar Typhimurium. Our results proved that the strains selected for this work were non-clonal S. 4,[5],12:i:- strains circulating in Spain. Using WGS data, we identified 13 different deletion types of the second-phase flagellar genomic region. Most of the deletions were generated by IS26 insertions, showing orientation-dependent conserved deletion ends. In addition, we detected S. 4,[5],12:i:- strains of the American clonal line that would give rise to the Southern European clone in Spain. Our results suggest that new S. 4,[5],12:i:- strains are continuously emerging from different S. Typhimurium strains via different genetic events, at least in swine products.
Starting Page	2049
e-ISSN	20762607
DOI	10.3390/microorganisms8122049
Journal	Microorganisms
Issue Number	12
Volume Number	8
Language	English
Publisher	MDPI
Publisher Date	2020-12-21
Access Restriction	Open
Subject Keyword	Microorganisms Microbiology Salmonella Monophasic Deletion Is26 Insertion Typing Whole Genome Sequencing
Content Type	Text
Resource Type	Article

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