江西农业学报
江西農業學報
강서농업학보
ACTA AGRICULTURAE JIANGXI
2014年
1期
94-96,106
,共4页
张扬%陈丽鹏%吴华%赵金凤%许瑞%贺志沛%胡功政
張颺%陳麗鵬%吳華%趙金鳳%許瑞%賀誌沛%鬍功政
장양%진려붕%오화%조금봉%허서%하지패%호공정
微量稀释法%四环素耐药基因%鸡源大肠杆菌%ERIC-PCR
微量稀釋法%四環素耐藥基因%鷄源大腸桿菌%ERIC-PCR
미량희석법%사배소내약기인%계원대장간균%ERIC-PCR
Microdilution method%Tetracycline-tolerant gene%Escherichia coli from chicken%ERIC-PCR
用肉汤稀释法测定32株鸡源大肠杆菌对四环素等8种抗菌药物的敏感性,用PCR方法检测5种四环素耐药基因( tet基因),并用ERIC-PCR方法分析试验菌株间的克隆关系。结果显示:32株大肠杆菌对四环素、多西环素的耐药率分别为84%、75%,tetA和tetB阳性率分别为78%和25%。总tet基因阳性率为90.6%,与对四环素、多西环素的耐药率基本一致。携带1种或2种tet基因的临床分离菌,不仅对四环素类药物耐药,还对头孢噻肟、环丙沙星、新霉素和氟苯尼考耐药,呈现多重耐药的特点。试验菌共分为A~O 15个ERIC型,tetA和tetB几乎均匀分布于不同ERIC型菌株中,表明其在试验菌株间水平扩散。
用肉湯稀釋法測定32株鷄源大腸桿菌對四環素等8種抗菌藥物的敏感性,用PCR方法檢測5種四環素耐藥基因( tet基因),併用ERIC-PCR方法分析試驗菌株間的剋隆關繫。結果顯示:32株大腸桿菌對四環素、多西環素的耐藥率分彆為84%、75%,tetA和tetB暘性率分彆為78%和25%。總tet基因暘性率為90.6%,與對四環素、多西環素的耐藥率基本一緻。攜帶1種或2種tet基因的臨床分離菌,不僅對四環素類藥物耐藥,還對頭孢噻肟、環丙沙星、新黴素和氟苯尼攷耐藥,呈現多重耐藥的特點。試驗菌共分為A~O 15箇ERIC型,tetA和tetB幾乎均勻分佈于不同ERIC型菌株中,錶明其在試驗菌株間水平擴散。
용육탕희석법측정32주계원대장간균대사배소등8충항균약물적민감성,용PCR방법검측5충사배소내약기인( tet기인),병용ERIC-PCR방법분석시험균주간적극륭관계。결과현시:32주대장간균대사배소、다서배소적내약솔분별위84%、75%,tetA화tetB양성솔분별위78%화25%。총tet기인양성솔위90.6%,여대사배소、다서배소적내약솔기본일치。휴대1충혹2충tet기인적림상분리균,불부대사배소류약물내약,환대두포새우、배병사성、신매소화불분니고내약,정현다중내약적특점。시험균공분위A~O 15개ERIC형,tetA화tetB궤호균균분포우불동ERIC형균주중,표명기재시험균주간수평확산。
The susceptibilities of 32 strains of Escherichia coli isolated from chickens to 8 antibacterial agents were determined with broth microdilution method, the presence of 5 tetracycline-tolerant genes (tet genes) was investigated by using PCR method, and the clonal relationship among the tested isolates was assessed by using ERIC -PCR method .The results revealed that the toler-ant rates of 32 isolates to tetracycline and doxycycline were 84%and 75%respectively, and the positive rates of genes tetA and tetB in these strains were 78%and 25%respectively.Total positive rate of gene tet in 32 strains was 90.6%, which was basically con-sistent with the above drug -tolerant rates .The isolates carrying one or two tet genes were tolerant not only to tetracycline , but also to cefotaxime, ciprofloxacin, florfenicol and neomycin, showing multidrug tolerance.A total of 15 ERIC patterns (A~O) were ob-served among the 32 strains of E.coli.The genes tetA and tetB were found to almost equally distribute on various ERIC -pattern i-solates, indicating their horizontal spread in E.coli isolates.