1. Genomic epidemiology of emerging ESBL-producing Salmonella Kentucky bla CTX-M-14b in Europe.
- Author
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Coipan CE, Westrell T, van Hoek AHAM, Alm E, Kotila S, Berbers B, de Keersmaecker SCJ, Ceyssens PJ, Borg ML, Chattaway M, McCormick J, Dallman TJ, and Franz E
- Subjects
- Adolescent, Adult, Africa, Northern epidemiology, Aged, Aged, 80 and over, Bayes Theorem, Child, Child, Preschool, Chromosomes, Bacterial, Ciprofloxacin pharmacology, Egypt epidemiology, Europe epidemiology, Female, Genomics, Humans, Infant, Infant, Newborn, Male, Microbial Sensitivity Tests, Middle Aged, Molecular Epidemiology, Phylogeny, Plasmids, Salmonella Infections microbiology, Salmonella enterica drug effects, Salmonella enterica isolation & purification, Whole Genome Sequencing, Young Adult, Anti-Bacterial Agents pharmacology, Drug Resistance, Multiple, Bacterial genetics, Salmonella Infections epidemiology, Salmonella enterica genetics, beta-Lactamases genetics
- Abstract
Global dissemination of ciprofloxacin-resistant Salmonella Kentucky has been observed over the past decades. In recent years, there have been reports of extended-spectrum β-lactamase (ESBL) producing S . Kentucky. Routine surveillance at the European Centre for Disease Prevention and Control (ECDC) detected cases with a ciprofloxacin-resistant S . Kentucky with the ESBL-gene bla
CTX-M-14b . Ensuing research identified 78 cases in 2013-2018 in eight European countries. Compared to other S . Kentucky and non-typhoidal Salmonella clone to approximately 2005 in Northern Africa, most likely in Egypt. The geographic origin predicted by the phylogenetic analysis is consistent with the patients' travel history. Next to multiple introductions of the clone to Europe from Egypt, our analysis suggests that in some parts of Europe the clone might have formed a stable population, from which further spread has occurred. Comparative genomics indicated that the blaCTX-M-14b clone to approximately 2005 in Northern Africa, most likely in Egypt. The geographic origin predicted by the phylogenetic analysis is consistent with the patients' travel history. Next to multiple introductions of the clone to Europe from Egypt, our analysis suggests that in some parts of Europe the clone might have formed a stable population, from which further spread has occurred. Comparative genomics indicated that the blaCTX-M-14b gene is present on the bacterial chromosome, within the type VI secretion system region. The blaCTX-M-14b gene is integrated downstream of the hcp1 gene, on a 2854 bp plasmid fragment containing also IS Ecp1 . This is the first report of a chromosomally integrated CTX-M gene in Salmonella spp. in Europe, previous studies having identified similar genes only on plasmids.- Published
- 2020
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