Association of mutation patterns in GyrA and ParC genes with quinolone resistance levels in lactic acid bacteria

The quinolone resistance of 19 lactic acid bacterial strains belonging to the genera Enterococcus and Lactobacillus isolated from the natural fermented koumiss and yoghurt were investigated. The objective of this study was to determine the quinolone resistance levels and to explore the association o...

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Veröffentlicht in:Journal of antibiotics 2015-02, Vol.68 (2), p.81-87
Hauptverfasser: Li, Shaoying, Li, Zhen, Wei, Wan, Ma, Chunyan, Song, Xiaomin, Li, Shufen, He, Wenying, Tian, Jianjun, Huo, Xiaoyan
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container_issue 2
container_start_page 81
container_title Journal of antibiotics
container_volume 68
creator Li, Shaoying
Li, Zhen
Wei, Wan
Ma, Chunyan
Song, Xiaomin
Li, Shufen
He, Wenying
Tian, Jianjun
Huo, Xiaoyan
description The quinolone resistance of 19 lactic acid bacterial strains belonging to the genera Enterococcus and Lactobacillus isolated from the natural fermented koumiss and yoghurt were investigated. The objective of this study was to determine the quinolone resistance levels and to explore the association of the resistance with the mutation patterns in gyrA and parC genes, as is currently recommended by the Food and Agriculture Organization/World Health Organization Joint Expert Committee in Guidelines for Evaluation of Probiotics in Food for probiotic lactic acid bacteria drug resistance in 2001. The Oxford Cup method and double-tube dilution method were used to determine the quinolone resistance levels of the isolated strains. Generally, all of the 19 strains showed resistance towards norfloxacin and ciprofloxacin when the Oxford cup method was used, whereas the incidence was lower (to norfloxacin 89.5% and to ciprofloxacin 68.4%) when minimum inhibitory concentration breakpoints (CLSI M100-S23) were tested. Furthermore, gene sequencing was conducted on gyrA and parC of topoisomerase II of these isolated strains. The genetic basis for quinolone resistance may be closely related to mutations in gyrA genes as there were 10 mutation sites in amino-acid sequences encoded by gyrA genes in 10 quinolone resistance strains and 14 mutation sites in Enterococcus durans HZ28, whereas no typical mutations were detected in parC genes.
doi_str_mv 10.1038/ja.2014.113
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The objective of this study was to determine the quinolone resistance levels and to explore the association of the resistance with the mutation patterns in gyrA and parC genes, as is currently recommended by the Food and Agriculture Organization/World Health Organization Joint Expert Committee in Guidelines for Evaluation of Probiotics in Food for probiotic lactic acid bacteria drug resistance in 2001. The Oxford Cup method and double-tube dilution method were used to determine the quinolone resistance levels of the isolated strains. Generally, all of the 19 strains showed resistance towards norfloxacin and ciprofloxacin when the Oxford cup method was used, whereas the incidence was lower (to norfloxacin 89.5% and to ciprofloxacin 68.4%) when minimum inhibitory concentration breakpoints (CLSI M100-S23) were tested. Furthermore, gene sequencing was conducted on gyrA and parC of topoisomerase II of these isolated strains. 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subjects 38
38/77
45/23
631/326/22/1434
Acids
Amino Acid Sequence
Anti-Bacterial Agents - pharmacology
Bacteria
Bacteriology
Biomedical and Life Sciences
Bioorganic Chemistry
Ciprofloxacin - pharmacology
Cultured Milk Products - microbiology
DNA Gyrase - genetics
DNA Topoisomerase IV - genetics
DNA Topoisomerases, Type II - genetics
Drug resistance
Drug Resistance, Bacterial - genetics
Enterococcus - drug effects
Enterococcus - genetics
Enterococcus - isolation & purification
Lactic Acid - metabolism
Lactobacillus - drug effects
Lactobacillus - genetics
Lactobacillus - isolation & purification
Life Sciences
Medicinal Chemistry
Microbial Sensitivity Tests
Microbiology
Mutation
Norfloxacin - pharmacology
Organic Chemistry
original-article
Quinolones - pharmacology
Yogurt
Yogurt - microbiology
title Association of mutation patterns in GyrA and ParC genes with quinolone resistance levels in lactic acid bacteria
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