Prevalence and characteristics of extended spectrum beta-lactamase-producing Escherichia coli from bovine mastitis cases in China
文献类型： 外文期刊
作者： Yang Feng 1 ; Zhang Shi-dong 1 ; Shang Xiao-fei 1 ; Wang Xu-rong 1 ; Wang Ling 1 ; Yan Zuo-ting 1 ; Li Hong-sheng 1 ;
作者机构： 1.Chinese Acad Agr Sci, Lanzhou Inst Husb & Pharmaceut Sci, Lanzhou 730050, Gansu, Peoples R China
关键词： extended spectrum beta-lactamase; Escherichia coli; multidrug-resistance; bovine mastitis
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2018 年 17 卷 6 期
页码：
收录情况： SCI
摘要： The aim of the study was to investigate the prevalence and characterization of extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli isolated from bovine mastitis cases in China. ChromID ESBL agar was used to confirm ESBL-producing E. coli. PCR and DNA sequencing were employed to characterize the genotype of ESBL-producers. Antimicrobial susceptibility was measured by disc diffusion. Overall, 73 of 318 E. coli isolates (22.96%) were identified as ESBL-producers. Of these ESBL-producing E. coli, the prevalence of bla(CTX-M) and bla(TEM-1) was 97.26 and 71.23%, respectively. The predominant CTX-M-type ESBL was CTX-M-15 (65.75%), followed by CTX-M-14 (10.96%), CTX-M-55 (9.59%), CTX-M-64 (5.48%), CTX-M-65 (4.11%) and CTX-M-3 (1.37%). This study is the first report of CTX-M-64 and CTX-M-65 in E. coli isolated from bovine mastitis. Furthermore, 72 ESBL-producing E. coli isolates (98.63%) were found to be multidrug-resistance. This study noted high prevalence and rates of antimicrobial resistance of ESBL-producing E. coli isolates from bovine mastitis cases in China.
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