Characterization of Quinolone-Resistant Determinants in Tribe Proteeae Isolated from Pet Turtles with High Prevalence of qnrD and Novel gyrB Mutations
| Autor: | Hansani Nilupama Kumari Senarath Pathirana, Benthotage Chamara Jayasankha De Silva, S.H.M.P. Wimalasena, Gee-Wook Shin, Gang-Joon Heo, Sabrina Hossain |
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| Rok vydání: | 2019 |
| Předmět: |
Microbiology (medical)
Pharmacology 0303 health sciences biology Nalidixic acid 030306 microbiology medicine.drug_class Immunology biochemical phenomena metabolism and nutrition Quinolone biology.organism_classification Microbiology Ciprofloxacin 03 medical and health sciences Antibiotic resistance Levofloxacin medicine Ofloxacin Gene Bacteria 030304 developmental biology medicine.drug |
| Zdroj: | Microbial Drug Resistance. 25:611-618 |
| ISSN: | 1931-8448 1076-6294 |
| DOI: | 10.1089/mdr.2018.0041 |
| Popis: | Development of antibiotic resistance in bacteria has challenged significantly in both veterinary and human medicine. In this study, we analyzed the potential risk of pet turtles harboring tribe Proteeae as a source of quinolone-resistant determinants, including plasmid-mediated quinolone resistance (PMQR) genes and target gene alterations in the quinolone resistance-determining region (QRDR). Antimicrobial susceptibility of 54 Proteeae isolates against ciprofloxacin, ofloxacin, levofloxacin, and nalidixic acid was examined. The PMQR genes and QRDR alterations were identified using conventional PCR assays and sequencing. Four isolates were resistant to all quinolones tested in this study. Nine isolates showed resistance to nalidixic acid and showed either intermediate resistance or susceptibility to other tested quinolones. All isolates resistant to one or more tested quinolones harbored mutations in gyrB and some also had gyrA and parC mutations. Of 54, 12 Proteeae isolates displayed the novel E466D, N440T, Q411S, and F417L mutations in gyrB. Among the PMQR genes, 41 (76%) isolates harbored the qnrD gene with the highest prevalence, whereas aac(6')Ib-cr, qnrS, qnrA, and qnrB genes were detected in 28 (52%), 9 (17.0%), 7 (13.0%), and 1 (1.9%) study isolates, respectively. The QRDR analysis of selected mutants revealed that increasing quinolone selective pressure led to a predominance of gyrA mutants. All results indicate that a healthy pet turtle can play as a potential reservoir for quinolone-resistant Proteeae, which it might cause public health risk on pet owners. |
| Databáze: | OpenAIRE |
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