Characterisation of extended-spectrum β-lactamase and AmpC β-lactamase-producing Enterobacteriaceae isolated from companion animals in New Zealand
| Autor: | Ali Karkaba, Alex Grinberg, Jackie Benschop, Eve Pleydell |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
040301 veterinary sciences medicine.medical_treatment 030106 microbiology Drug resistance Cat Diseases Gene Expression Regulation Enzymologic beta-Lactamases Microbiology 0403 veterinary science 03 medical and health sciences Antibiotic resistance Dogs Enterobacteriaceae Drug Resistance Multiple Bacterial medicine polycyclic compounds Animals Dog Diseases Antiinfective agent General Veterinary biology Enterobacteriaceae Infections 04 agricultural and veterinary sciences General Medicine Gene Expression Regulation Bacterial Pets biochemical phenomena metabolism and nutrition biology.organism_classification Antimicrobial bacterial infections and mycoses Virology Multiple drug resistance Beta-lactamase Cats Multilocus sequence typing bacteria New Zealand |
| DOI: | 10.6084/m9.figshare.4434635.v2 |
| Popis: | AIMS: To assess the occurrence of, and characterise, extended-spectrum β-lactamase (ESBL) and AmpC β-lactamase (AmpC)-producing Enterobacteriaceae isolated by veterinary diagnostic laboratories from infection sites in companion animals in New Zealand. METHODS: Selected Enterobacteriaceae isolates were submitted by seven New Zealand veterinary diagnostic laboratories. They were isolated from infection sites in companion animals between June 2012 and June 2013, and were resistant to amoxicillin-clavulanic acid, fluoroquinolones, or any combination of two or more antimicrobials. Based on disk diffusion test results, the isolates were phenotypically categorised according to production of ESBL and AmpC. Genes for ESBL and AmpC production were amplified by PCR and sequenced. Escherichia coli isolates were also typed by multilocus sequence typing. RESULTS: A total of 115 isolates matching the inclusion criteria were obtained from the participating laboratories, of which 74 (64%) originated from dogs and 29 (25%) from cats. Seven bacterial species were identified, of which E. coli was the most common (87/115, 76%). Of the 115 isolates, 10 (9%) expressed the ESBL phenotype, 43 (37%) the AmpC phenotype, and seven (6%) both ESBL and AmpC phenotypes. Of the 60 ESBL and AmpC-producing isolates, 36 (60%) were E. coli. Amongst these isolates, 27/60 (45%) were classified as multidrug resistant, compared with 15/55 (27%) non-ESBL or AmpC-producing isolates (pblaCTX-M-14 and blaCTX-M-15, and the dominant plasmid-encoded AmpC gene was blaCMY-2. Thirty-eight E. coli multilocus sequence types (ST) were identified, and the most prevalent were ST12 (12/89, 13%), ST131 (6/89, 7%) and ST648 (6/89, 7%). ESBL and AmpC-producing isolates accounted for 35/1,082 (3.2%) of the Enterobacteriaceae isolated by one laboratory network over the study period. CONCLUSIONS AND CLINICAL RELEVANCE: ESBL and AmpC-producing Enterobacteriaceae were associated with clinical infections in companion animals in New Zealand, and were often multidrug resistant. In this study, these organisms accounted for |
| Databáze: | OpenAIRE |
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