Dataset Information

Occurrence and Diversity of CTX-M-Producing Escherichia coli From the Seine River.

ABSTRACT: CTX-M-producing Escherichia coli are spreading since 1999 both in clinical and in community settings. Environmental samples such as rivers have also been pointed out as being vectors for ESBL producers. In this report, we have investigated the presence and the diversity of CTX-M-producing E. coli isolates in two samplings of the Seine River (next to Notre Dame), Paris France, performed in June 2016 and 2017. The total number of bacteria growing on the selective ChromID ESBL agar was 3.1 × 10⁵ cfu/L (23.8% of all growing bacteria) in 2016, whereas it was 100-fold lower in 2017 (3 × 10³ cfu/L; 8.3% of all growing bacteria). However, among them, the prevalence of ESBL-producing E. coli increased from <0.1 to 1.1% in one-year. ESBLs were exclusively of the CTX-M-type: CTX-M-1 (n = 5), CTX-M-15 (n = 7), CTX-M-14 (n = 1), and CTX-M-27 (n = 2). The isolates belonged to several multi locus sequence types, and a wide diversity of incompatibility groups of plasmids were identified in those E. coli isolates. The occurrence and diversity of E. coli isolates belonging to many clones and producing many CTX-M-variants have been identified in our study. The presence of these bacteria in rivers that are open again for recreational usage (swimming) is worrying as it may contribute to further dissemination of ESBL producers in the community.

SUBMITTER: Girlich D

PROVIDER: S-EPMC7755597 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Occurrence and Diversity of CTX-M-Producing Escherichia coli From the Seine River.

Girlich Delphine D Bonnin Rémy A RA Naas Thierry T

Frontiers in microbiology 20201209

CTX-M-producing Escherichia coli are spreading since 1999 both in clinical and in community settings. Environmental samples such as rivers have also been pointed out as being vectors for ESBL producers. In this report, we have investigated the presence and the diversity of CTX-M-producing E. coli isolates in two samplings of the Seine River (next to Notre Dame), Paris France, performed in June 2016 and 2017. The total number of bacteria growing on the selective ChromID ESBL agar wa ...[more]

PMID: 33362749

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Project description:BackgroundWildlife zoos provide the opportunity for children and adults to interact with animals, However, it's unknown that the risk of contact with animals, which carried zoonotic pathogens and antimicrobial resistant bacteria.ObjectivesThis study aimed to investigate the prevalence and antimicrobial susceptibility of extended-spectrum β-lactamases Escherichia coli (ESBLs-EC) from a wildlife zoo in China.MethodsA total of 93 wildlife faecal samples were collected from a wildlife zoo. Agar dilution method was used to determine the resistant phenotype. Whole genomes sequencing and bioinformatic analysis were employed to evaluate the molecular typing and genetic relationships of ESBLs-EC.ResultsA total of 23 CTX-M-positive ESBLs-EC were isolated from swan (n = 14), squirrel monkey (n = 5), black hat hanging monkey (n = 2), gibbon monkey (n = 1) and phoenicopteridae (n = 1) respectively. All ESBLs-EC strains were resistant to cefotaxime, tetracycline, ciprofloxacin and trimethoprim-sulfamethoxazole, but susceptible to colistin, tigecycline, meropenem and amikacin. By screening whole genome sequences, ESBLs-EC strains main carried blaCTX-M-55 (34.8%, 8/23) and blaCTX-M-14 (26.0%, 6/23), following by blaCTX-M-27 (21.7%, 5/23), blaCTX-M-15 (13.0%, 3/23) and blaCTX-M-121 (4.3%, 1/23). ESBLs-EC strains mainly belonged to phylogroup A (60.9%, 14/23), and ST48, ST746 and ST616 (3 strains respectively, 13.0%) were major ST types. Core genome-based single nucleotide polymorphism (SNP) analysis suggested that strains from the swan, over the phylogenetic tree, have a closer genetic relationship with strains from other animals (black hat hanging monkey, gibbon monkey, phoenicopteridae and squirrel monkey).ConclusionsCTX-M type ESBLs-EC can transmit between animals in wildlife zoos, which may be a risk of spread to animal keepers, veterinarians and visitors when contact with animals. Our study provides that the importance of hygiene measures to minimise the risk of transmission of ESBLs-EC to visitors in wildlife zoos.

Dataset Information

Occurrence and Diversity of CTX-M-Producing Escherichia coli From the Seine River.

Publications

Occurrence and Diversity of CTX-M-Producing <i>Escherichia coli</i> From the Seine River.

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