动物源性金黄色葡萄球菌耐药性的检测

用K B法对52株动物源性金黄色葡萄球菌进行了 17 种抗生素耐药性检测。结果,试验菌对16种抗生素的耐药率达 19.2%~84.6%,耐药率最高的为氨苄青霉素,最低的为头孢曲松;其中对12种抗生素的耐药率在50.0%以上;在52株金黄色葡萄球菌中最少的耐 2 种抗生素,最多的耐15种抗生素,表明临床分离的金黄色葡萄球菌株均表现高水平耐药和多重耐药;受试菌均对万古霉素敏感。     

超高效液相色谱-串联质谱法同时测定尿液中16种抗生素

目的 建立同时分析尿液中16种抗生素的超高效液相色谱-串联质谱(UPLC-MS、MS)方法.方法 以哌拉西林为内标.尿样中的目标化合物经Oasis HLB固相萃取柱富集、纯化,利用ZORBAX SB-C18色谱柱,以0.1%的甲酸溶液-乙腈为流动相经梯度洗脱分离,采用多反应监测(MRM)模式进行分析.结果各化合物的最低...     

Battle Against Antibiotics

正In spite of tough measures,the overuse of antibiotics in China is still rampant Since penicillin was invented in 1928,antibiotics have spread rapidly around the world.In China,antibiotics are commonly referred to by another name—medicine to diminish inflammation.     

高剂量锌及抗生素对预防断奶仔猪腹泻和促生长的影响

将 4 0头 2 8日龄断奶杂交仔猪分为 5组 ,分别饲喂基础日粮、抗生素 (硫酸黏杆菌素 10mg/kg 利高霉素 2 5mg/kg)和高剂量锌 (1、3、5 g/kg) ,观察了高剂量锌、抗生素对断奶仔猪腹泻和生长的影响。试验结果表明 ,抗生素和高剂量锌均能提高仔猪的日采食量和日增重 ,并能大幅度降低仔猪腹泻率 ,从饲料转化率和预防腹泻效果来看 ,以添加 3g/kg氧化锌的效果较好。     

Development of an Antibody Hapten‐Chip System for Detecting the Residues of Multiple Antibiotic Drugs*

Abstract: The abuse of antibiotic drugs during animal production remains a worldwide problem and the subsequent detection of the residues of various drugs present at low concentrations in complex biological matrices poses significant analytical challenges. The present study outlines a practical biochip assay system to identify antibiotic residues in different animal tissue extracts. The system uses a simple but efficient multiresidue sample extraction procedure to isolate the antibiotic residues which were then identified directly using high‐affinity monoclonal antibodies presented in a competitive immunoassay with conjugated antibiotic hapten‐chips. The hapten‐chip can analyze six samples each for eight antibiotics on a single chip within 3 h. The analytical results with both artificial positive standard samples and the incurred samples show that the antibody hapten‐chip system has a comparable accuracy and a similar sensitivity to a standard ultra performance liquid chromatography–mass spectrometry (MS)/MS assay. In conclusion, an effective analytical screening system based on antibody hapten‐chip was developed for detecting multiple antibiotic residues from multiple samples.     

41种抗生素LC/MS联合测定的谱图库建立

目的建立常见41种抗生素LC/MS联合测定谱图库。方法采用ZORBAX sb-aq,2.1mm×150mm×3.5μm（带预柱）;柱温：30℃;流动相：甲酸（0.1%）甲醇和甲酸（0.1%）水溶液梯度条件;流速：0.4mL/min;通过电喷雾电离（ESI）,自动三级质谱检测。结果应用液质联用仪通用检测方法,得到了含有41种常见抗生素的自用质谱谱库和保留时间参数谱图库。通过谱图解卷积和保留时间锁定软件方法实现数据自动处理。结论该方法具有不易漏检和减少假阳性的优点,完全可替代手工检索质谱,可用于实际案件检验。     

Executive action to combat the rise of drug-resistant bacteria: is agricultural antibiotic use sufficiently addressed?

On September 18, 2014, President Barack Obama issued an Executive Order titled Combating Antibiotic-Resistant Bacteria. The order demands a ‘strategic, coordinated, and sustained effort’ to detect, prevent, and control antibiotic resistance. According to the Centers for Disease Control and Prevention (CDC), antibiotic-resistant infections are a rising health concern that result in at least two million illnesses and 23,000 deaths each year in the United States. The Executive Order and accompanying documents have been criticized for taking a weak stance against the use of antibiotics in agriculture; however, they include goals to promote antibiotic stewardship on farms, better surveillance of antibiotic use, and the development of alternatives to antibiotics. The criticisms are also unwarranted based on the current state of scientific evidence; nevertheless, there remain compelling reasons to limit the use of antibiotics in agriculture, and if fully implemented, the executive action is set to achieve this goal. This paper will explore why the criticisms are unwarranted, present the conflicting evidence on whether antibiotic use in farm animals poses a significant health threat to humans, offer other reasons to limit the use of antibiotics in livestock, and suggest ways that the government can maximize the efficacy of the proposed actions.