摘要
空肠弯曲菌引起的食源性腹泻疾病已经成为突出的公共卫生问题之一,快速检测食品中空肠弯曲菌污染对于保障人类健康具有重要意义。本研究以空肠弯曲菌lpxA基因序列为检测靶基因,通过聚合酶链式反应(polymerase chain reaction,PCR)扩增产物上标记的地高辛和异硫氰酸盐(isothiocyanate,ITC)分子与试纸条上抗体特异性结合,建立了一种PCR-试纸条检测方法。所有空肠弯曲菌标准菌株均为阳性结果,其他弯曲菌以及食源性病原菌均为阴性结果,检测特异性为100%;最低检出限为3.1×103 CFU/mL;在对食品的实际检测中,该方法与现有国标检测方法结果一致。将本方法用于空肠弯曲菌的检测降低了成本,简化了操作步骤,为食源性空肠弯曲菌检测提供了一种实用、简便的手段。
Food-borne diarrheal disease caused by Campylobacter jejuni(C.jejuni)has become one of the prominent public health problems.Rapid detection of C.jejuni contamination in food is of great significance for protecting human health.In this study,the lpxA gene sequence of C.jejuni was used as the target gene,a PCR-test strip detection method was established by binding digoxin and isothiocyanate(ITC)molecules labeled on polymerase chain reaction(PCR)products to antibodies on the strip.All standard strains of C.jejuni were positive by our method,while other Campylobacter species and food-borne pathogens were negative result.The detection specificity was 100%,and the detection limit was 3.1×103 CFU/mL.This method is consistent with the results of the current national standard detection methods.The application of this method for the detection of C.jejuni would reduce the cost,simplify the operation procedure,and provide a practical and easy method for the detection of food-borne C.jejuni.
作者
李鑫岗
刘志勇
申进玲
郭德华
赵丽娜
于婕
陈瑜
周甜甜
王璇
徐博捷
只帅
LI Xin’gang;LIU Zhiyong;SHEN Jinling;GUO Dehua;ZHAO Li’na;YU Jie;CHEN Yu;ZHOU Tiantian;WANG Xuan;XU Bojie;ZHI Shuai(School of Public Health,Ningbo University Health Science Center,Ningbo 315211,China;Shanghai Xuhui Center for Disease Prevention and Control,Shanghai 200237,China;Technical Center of Animal,Plant and Food Inspection and Quarantine,Shanghai Customs,Shanghai 201210,China)
出处
《生命的化学》
CAS
2023年第12期1982-1990,共9页
Chemistry of Life
基金
上海市技术标准专项项目(23DZ2203700)
宁波市自然科学基金项目(2023J074)
宁波市公益性研究计划项目(2023S071)。
关键词
空肠弯曲菌
聚合酶链式反应
免疫试纸条
Campylobacter jejuni
polymerase chain reaction
immune test strip
