Plasmid-mediated quinolone resistance in Escherichia coli strains isolated from food animals / 中华微生物学和免疫学杂志
Chinese Journal of Microbiology and Immunology
; (12): 477-482, 2010.
Article
in Zh
| WPRIM
| ID: wpr-383663
Responsible library:
WPRO
ABSTRACT
Objective To study on plasmid-mediated quinolone-resistant in Escherichia coli strains isolated from fecal samples of chicken and swine from the nine farms around our country.Methods Antimi-crobial susceptibility testing was carried out by broth microdilution testing,gyrA,gyrB,parC,qnr and aac (6')- Ⅰ b-cr were examined by PCR,and the products were sequenced.Conjugation experiment was carried out to proved that the plasmid-mediated quinolone resistance was transferable.Results In the total 818 animal isolates,qnr and aac genes were detected in 38 (4.6%) and 75 (9.2%) strains.The qnrA,qnrB,and qnrS genes were detected in 1 (0.1%),9 (1.1%) and 28 (3.4%) of the isolates.All isolates were negative for qnrC,qnrD genes.Conclusion There is a close relationship between high level quinolone resistance and plasmid-mediated quinolone resistance.The results of the current study highlight food-producing animals as a potential reservoir of antimicrobial-resistant bacteria and clinically important resistance genes.More attention should be paid to the surveillance of such strains.
Full text:
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Index:
WPRIM
Language:
Zh
Journal:
Chinese Journal of Microbiology and Immunology
Year:
2010
Type:
Article