为了解奇异变形杆菌持留菌形成特征和防控家禽养殖中细菌性疾病,以鸡源致病菌奇异变形杆菌PM2658为研究对象,通过二倍稀释法测得抗生素对鸡源奇异变形杆菌PM2658的最小抑菌浓度(Minimum inhibitory of concentration,MIC),用斑点培养(sp...为了解奇异变形杆菌持留菌形成特征和防控家禽养殖中细菌性疾病,以鸡源致病菌奇异变形杆菌PM2658为研究对象,通过二倍稀释法测得抗生素对鸡源奇异变形杆菌PM2658的最小抑菌浓度(Minimum inhibitory of concentration,MIC),用斑点培养(spot-plate)法分析PM2658在不同抗生素和营养条件下持留菌形成特征。结果显示,硫酸庆大霉素、头孢噻肟钠、氧氟沙星对PM2658的MIC值分别为1.56、0.78和3.13μg·mL-1。在16×MIC和100×MIC硫酸庆大霉素处理下,鸡源奇异变形杆菌PM2658都可以形成持留菌,形成率分别为8.04×10^(-4)和1.03×10^(-6)。16×MIC硫酸庆大霉素-4×MIC头孢噻肟钠、16×MIC硫酸庆大霉素-4×MIC氧氟沙星、4×MIC头孢噻肟钠-4×MIC氧氟沙星、16×MIC硫酸庆大霉素-4×MIC头孢噻肟钠-4×MIC氧氟沙星不同抗生素组合处理下,鸡源奇异变形杆菌PM2658的持留菌形成规律与单独硫酸庆大霉素处理的持留菌形成规律一致,也表明鸡源奇异变形杆菌PM2658持留菌具有多重抗生素耐受性。在16×MIC硫酸庆大霉素处理下,与LB和1/2LB培养条件相比,1/5LB培养条件下鸡源奇异变形杆菌持留菌形成率最高,比前两者分别提高了17.67倍和5.05倍,说明鸡源奇异变形杆菌持留菌的形成还与营养环境密切相关。持留菌遗传学特性检测结果显示,鸡源奇异变形杆菌PM2658持留菌的遗传学特性并没有发生改变。鸡源奇异变形杆菌确实可以形成持留菌,其形成特征取决于特定的抗生素条件。展开更多
The prevalence of antibiotic susceptibility and disinfectant resistance in bacterial pathogens causes a serious problem not only to food safety but also to public health, which directly or indirectly leads to treatmen...The prevalence of antibiotic susceptibility and disinfectant resistance in bacterial pathogens causes a serious problem not only to food safety but also to public health, which directly or indirectly leads to treatment and disinfection failures. In this review, multidrug resistance, the mechanism of disinfectant resistance, the methods for detecting disinfectant resistance and the cross-resistance between an- tibiotics and disinfectants are summarized. More efforts should be devoted to explor- ing the professional guidance of using antibiotics and disinfectants, and to develop- ing the comprehensive detection with genetic and molecular methods is highly ex- pected.展开更多
文摘为了解奇异变形杆菌持留菌形成特征和防控家禽养殖中细菌性疾病,以鸡源致病菌奇异变形杆菌PM2658为研究对象,通过二倍稀释法测得抗生素对鸡源奇异变形杆菌PM2658的最小抑菌浓度(Minimum inhibitory of concentration,MIC),用斑点培养(spot-plate)法分析PM2658在不同抗生素和营养条件下持留菌形成特征。结果显示,硫酸庆大霉素、头孢噻肟钠、氧氟沙星对PM2658的MIC值分别为1.56、0.78和3.13μg·mL-1。在16×MIC和100×MIC硫酸庆大霉素处理下,鸡源奇异变形杆菌PM2658都可以形成持留菌,形成率分别为8.04×10^(-4)和1.03×10^(-6)。16×MIC硫酸庆大霉素-4×MIC头孢噻肟钠、16×MIC硫酸庆大霉素-4×MIC氧氟沙星、4×MIC头孢噻肟钠-4×MIC氧氟沙星、16×MIC硫酸庆大霉素-4×MIC头孢噻肟钠-4×MIC氧氟沙星不同抗生素组合处理下,鸡源奇异变形杆菌PM2658的持留菌形成规律与单独硫酸庆大霉素处理的持留菌形成规律一致,也表明鸡源奇异变形杆菌PM2658持留菌具有多重抗生素耐受性。在16×MIC硫酸庆大霉素处理下,与LB和1/2LB培养条件相比,1/5LB培养条件下鸡源奇异变形杆菌持留菌形成率最高,比前两者分别提高了17.67倍和5.05倍,说明鸡源奇异变形杆菌持留菌的形成还与营养环境密切相关。持留菌遗传学特性检测结果显示,鸡源奇异变形杆菌PM2658持留菌的遗传学特性并没有发生改变。鸡源奇异变形杆菌确实可以形成持留菌,其形成特征取决于特定的抗生素条件。
基金Supported by the National Key Research and Development Program of China(2016YFD0501208)the Social Development Program of Yangzhou(YZ2016058)+1 种基金the National Major Project for Agro-product Quality&Safety Risk Assessment(GJFP2017007)the Project for the Construction of Science and Technology Service Platform for Poultry Quality and Safety of Yangzhou(yz2015162)~~
文摘The prevalence of antibiotic susceptibility and disinfectant resistance in bacterial pathogens causes a serious problem not only to food safety but also to public health, which directly or indirectly leads to treatment and disinfection failures. In this review, multidrug resistance, the mechanism of disinfectant resistance, the methods for detecting disinfectant resistance and the cross-resistance between an- tibiotics and disinfectants are summarized. More efforts should be devoted to explor- ing the professional guidance of using antibiotics and disinfectants, and to develop- ing the comprehensive detection with genetic and molecular methods is highly ex- pected.
