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鹅、鱼源大肠杆菌的耐药性研究

Study on drug resistance of goose and fish-derived Escherichia coli

  • 摘要: 为了研究鹅、鱼源大肠杆菌对12种禽畜用抗生素的耐药程度,试验对分离的鹅、鱼源大肠杆菌(各50株)进行耐药性研究,利用微膜过滤法制备诺氟沙星、氟苯尼考、庆大霉素、大观霉素、替米考星、泰乐菌素、金霉素、四环素、阿莫西林、多西环素、恩诺沙星、甲氧苄啶(TMP)的无菌悬液;通过96孔板培养法测定大肠杆菌对12种畜禽用抗生素的耐药情况,统计耐药率并分析耐药谱。结果表明:100株大肠杆菌对12种禽畜用抗生素药物均产生耐药性,鹅源大肠杆菌耐药率范围为46%~100%,鱼源大肠杆菌耐药率范围为86%~100%。同时,鹅源和鱼源大肠杆菌对同一种禽畜用抗生素的耐药性表现出差异,其中差异最大的是氟苯尼考(耐药率相差48百分点),然后依次是庆大霉素、诺氟沙星和四环素。鱼源大肠杆菌对12种禽畜用抗生素的多重耐药范围为9~12耐;鹅源大肠杆菌对12种禽畜用抗生素的多重耐药范围为7~12耐。说明鱼源和鹅源大肠杆菌对12种畜禽用抗生素均产生耐药性且耐药谱广。

     

    Abstract: In order to study the resistance of geese and fish-derived Escherichia coli(E.coli)to 12 kinds of antibiotics for poultry and livestock, the test conducted a drug resistance study on the isolated goose and fish-derived E.coli(50 strains each). Sterile suspensions of norfloxacin, florfenicol, gentamicin, spectinomycin, tilmicosin, tylosin, chlortetracycline, tetracycline, amoxicillin, doxycycline, enrofloxacin and trimethoprim(TMP),were prepared using micro-membrane filtration method; the drug resistance of E.coli to 12 kinds of livestock and poultry antibiotics was determined by 96-well plate culture method, and the drug resistance rate was counted and the drug resistance spectrum was analyzed. The results showed that 100 strains of E.coli were resistant to 12 kinds of antibiotics for poultry and livestock; the resistance rate of goose-derived E.coli was 46%-100%,and the resistance rate of fish-derived E.coli was 86%-100%. At the same time, geese and fish-derived E.coli showed difference in resistance to the same antibiotics for poultry and livestock; among them, the biggest difference was florfenicol(the difference in resistance rate was 48 percentage points),followed by gentamicin, norfloxacin and tetracycline. The multi-drug resistance of E.coli from fish to 12 kinds of poultry and animal antibiotics ranged from 9 to 12.The multiple drug resistance of E.coli from geese to 12 kinds of poultry and animal antibiotics ranged from 7 to 12.The results suggested that fish and goose-derived E.coli were resistant to 12 kinds of antibiotics for livestock and poultry, and drug-resistant spectrum were wide.

     

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