Comparative analysis of an mcr-4 Salmonella enterica subsp. enterica monophasic variant of human and animal origin

Carattoli, Alessandra; Carretto, Edoardo; Brovarone, Flavia; Sarti, Mario; Villa, Laura

doi:10.1093/jac/dky340

Cited by 11 publications

(12 citation statements)

References 12 publications

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“…Moreover, all mcr genes except ( mcr-6 and mcr-9 ) have been detected in samples from China. Thus far, mcr-2 (Belgium and Spain), mcr-3 (Brazil, Denmark, France, Germany, Japan, Spain and Thailand), mcr-4 (Italy and Spain), mcr-5 (Colombia, Japan, Spain and Germany), and mcr-9 (US) [27,29,30,31,32,33,34,35,36,37].…”

Section: Discussionmentioning

confidence: 99%

Global Burden of Colistin-Resistant Bacteria: Mobilized Colistin Resistance Genes Study (1980–2018)

et al. 2019

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Colistin is considered to be an antimicrobial of last-resort for the treatment of multidrug-resistant Gram-negative bacterial infections. The recent global dissemination of mobilized colistin resistance (mcr) genes is an urgent public health threat. An accurate estimate of the global prevalence of mcr genes, their reservoirs and the potential pathways for human transmission are required to implement control and prevention strategies, yet such data are lacking. Publications from four English (PubMed, Scopus, the Cochrane Database of Systematic Reviews and Web of Science) and two Chinese (CNKI and WANFANG) databases published between 18 November 2015 and 30 December 2018 were identified. In this systematic review and meta-analysis, the prevalence of mcr genes in bacteria isolated from humans, animals, the environment and food products were investigated. A total of 974 publications were identified. 202 observational studies were included in the systematic review and 71 in the meta-analysis. mcr genes were reported from 47 countries across six continents and the overall average prevalence was 4.7% (0.1–9.3%). China reported the highest number of mcr-positive strains. Pathogenic Escherichia coli (54%), isolated from animals (52%) and harboring an IncI2 plasmid (34%) were the bacteria with highest prevalence of mcr genes. The estimated prevalence of mcr-1 pathogenic E. coli was higher in food-animals than in humans and food products, which suggests a role for foodborne transmission. This study provides a comprehensive assessment of prevalence of the mcr gene by source, organism, genotype and type of plasmid.

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Section: Discussionmentioning

confidence: 99%

Global Burden of Colistin-Resistant Bacteria: Mobilized Colistin Resistance Genes Study (1980–2018)

et al. 2019

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“…The putative plasmid contigs were analyzed and re-assembled to build single circular plasmids by mapping reference complete plasmid genome. Additional sets of PCRs were performed to confirm the circular status of predicted plasmids as reported previously ( Carattoli et al., 2018 ; Xu et al., 2018 ). Genes were predicted with GeneMarkS™ and further annotated by BLASTP and BLASTN against NR databases and SwissProt.…”

Section: Methodsmentioning

confidence: 99%

Acquisition of a Stable and Transferable blaNDM-5-Positive Plasmid With Low Fitness Cost Leading to Ceftazidime/Avibactam Resistance in KPC-2-Producing Klebsiella pneumoniae During Treatment

Huang

Zhang

Zhao

et al. 2021

Front. Cell. Infect. Microbiol.

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The emergence and prevalence of carbapenem-resistant Enterobacteriaceae (CRE) have drawn worldwide attention. Ceftazidime/avibactam (CAZ/AVI) gives us a valuable alternative strategy to treat CRE infections. Unfortunately, CAZ/AVI resistance could occur during CAZ/AVI treatment. The CAZ/AVI-resistant Carbapenem-resistant Klebsiella pneumoniae (CR-KP) (KP137060) and earlier CAZ/AVI-susceptible isolate (KP135194) from the same hospitalized patient were collected at Fujian Medical University Union Hospital between October and November 2019. In this study, CAZ/AVI MICs of CAZ/AVI-susceptible and -resistant isolates (KP135194 and KP137060) were 4 mg/L and 128 mg/L, respectively; and the two isolates had the same antibiotic resistance pattern to other carbapenems. Two strains were then submitted for whole-genome sequencing and bioinformatic analysis. ompK36 was not detected in two isolates. No mutation was observed in blaKPC-2, ompK35 and ompK37 in this study and there was no significant difference of the expression in blaKPC-2, ompK35 and ompK37 between the two isolates (p>0.05). Two isolates were sequence type 11 and harbored blaKPC-2, blaSHV-182 and blaTEM-1B. Compared with KP135194, KP137060 harbored an additional blaNDM-5 positive plasmid. blaNDM-5 gene could be successfully transferred into E. coli J53 at a conjugation frequency of 1.14×10-4. Plasmid stability testing showed that blaKPC-2- and blaNDM-5-harboring plasmids were still stably maintained in the hosts. Growth assay and growth competition experiments showed there was no significant difference in fitness cost between two CR-KP isolates. Our study described the acquisition of a blaNDM-5-harboring plasmid leading to resistance to ceftazidime/avibactam in KPC-2-producing Klebsiella pneumoniae during treatment. This phenomenon deserves further exploration.

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“…In addition to bacterial traits, the host range of Salmonella 4,[5],12:i:- also plays a role in the success of this global pathogen, with outbreaks linked to food products derived from livestock 11 , 12 , 25 , 26 , particularly swine. For example, colistin resistance has been reported in Salmonella 4,[5],12:i:- isolates from pigs and humans in China, where there has been use of polymyxins as growth supplements in swine 14 , 18 , 27 . Further, mcr genes mediating colistin resistance have also been identified on plasmids with resistance genes to multiple antimicrobials, including third-generation cephalosporins (3GCs) 14 , 18 , 23 .…”

Section: Introductionmentioning

confidence: 99%

Evolutionary dynamics of multidrug resistant Salmonella enterica serovar 4,[5],12:i:- in Australia

et al. 2021

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Salmonella enterica serovar 4,[5],12:i:- (Salmonella 4,[5],12:i:-) is a monophasic variant of Salmonella Typhimurium that has emerged as a global cause of multidrug resistant salmonellosis. We used Bayesian phylodynamics, genomic epidemiology, and phenotypic characterization to describe the emergence and evolution of Salmonella 4,[5],12:i:- in Australia. We show that the interruption of the genetic region surrounding the phase II flagellin, FljB, causing a monophasic phenotype, represents a stepwise evolutionary event through the accumulation of mobile resistance elements with minimal impairment to bacterial fitness. We identify three lineages with different population dynamics and discrete antimicrobial resistance profiles emerged, likely reflecting differential antimicrobial selection pressures. Two lineages are associated with travel to South-East Asia and the third lineage is endemic to Australia. Moreover antimicrobial-resistant Salmonella 4,[5],12:i- lineages efficiently infected and survived in host phagocytes and epithelial cells without eliciting significant cellular cytotoxicity, suggesting a suppression of host immune response that may facilitate the persistence of Salmonella 4,[5],12:i:-.

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Comparative analysis of an mcr-4 Salmonella enterica subsp. enterica monophasic variant of human and animal origin

Cited by 11 publications

References 12 publications

Global Burden of Colistin-Resistant Bacteria: Mobilized Colistin Resistance Genes Study (1980–2018)

Global Burden of Colistin-Resistant Bacteria: Mobilized Colistin Resistance Genes Study (1980–2018)

Acquisition of a Stable and Transferable blaNDM-5-Positive Plasmid With Low Fitness Cost Leading to Ceftazidime/Avibactam Resistance in KPC-2-Producing Klebsiella pneumoniae During Treatment

Evolutionary dynamics of multidrug resistant Salmonella enterica serovar 4,[5],12:i:- in Australia

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