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Genetic characterization of antimicrobial resistance in Staphylococcus aureus isolated from bovine mastitis cases in Northwest China

文献类型： 外文期刊

作者： Yang Feng 1 ; Wang Qi; Wang Xu-rong 1 ; Wang Ling 1 ; Li Xin-pu 1 ; Luo Jin-yin 1 ; Zhang Shi-dong 2 ; Li Hong-sheng;

作者机构： 1.Chinese Acad Agr Sci, Engn & Technol Res Ctr Tradit Chinese Vet Med Gan, Key Lab Vet Pharmaceut Dev, Lanzhou Inst Husb & Pharmaceut Sci,Minist Agr, Lanzhou 730050, Peoples R China

2.Chinese Acad Agr Sci, Engn & Technol Res Ctr Tradit Chinese Vet Med Gan, Key Lab Vet Pharmaceut Dev, Lanzhou Inst Husb

关键词： bovine mastitis;Staphylococcus aureus;antimicrobial resistance;phenotype;genotype

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： 2016 年 15 卷 12 期

页码：

收录情况： SCI

摘要： Staphylococcus aureus is the most common etiological pathogen of bovine mastitis. The resistant strains make the disease difficult to cure. The aim of this study was to characterize the genetic nature of the antimicrobial resistance in S. aureus cultured from bovine mastitis in Northwest China in 2014. A total of 44 S. aureus were isolated for antimicrobial resistance and resistance-related genes. Antimicrobial resistance was determined by disc diffusion and the corresponding resistance genes were detected by PCR. Phenotype indicated that S. aureus isolates were resistant to penicillin (84.09%), erythromycin (20.45%), tetracycline (15.91%), gentamicin (9.09%), tobramycin (6.82%), kanamycin (6.82%) and methicillin (2.27%). 9.09% of the S. aureus isolates were classified as multidrug resistant. In addition, genotypes showed that the isolates were resistant to rifampicin (100%, rpoB), penicillin (95.45%, blaZ), tetracycline (22.73%, tetK, tetM, alone or in combination), erythromycin (22.73%, ermB or ermC), gentannicin/tobramycin/kanamycin (2.27%, aacA-aphD), methicillin (2.27%, mecA) and vancomycin (2.27%, vanA). Resistance to tetracycline was attributed to the genes tetK and tetM (r=0.558, P<0.001). This study noted high-level geno- and phenotypic antimicrobial resistance in S. aureus isolates from bovine mastitis cases in Northwest China.

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