摘要
目的:通过肠道门诊标本检出的聚集性大肠埃希菌,研究其相关致病因子的毒力基因。方法:使用生物膜形成试验筛检聚集性大肠埃希菌,获得菌株后,进行转译激活因子基因,CVD432质粒基因,聚集性大肠埃希菌Ⅰ型鞭毛基因、Ⅱ型鞭毛基因、Ⅲ型鞭毛基因、Ⅳ菌毛基因,质粒编码毒素基因,聚集性大肠埃希菌耐热性肠毒素基因等各种基因检测,研究不同基因的分布和生物膜实验的相关性。结果:可以通过生物膜形成试验筛检聚集性大肠埃希菌,并根据毒力基因分型。结论:生物膜形成实验作为利用生物学特性筛检聚集性大肠埃希菌有一定的应用价值,聚集性大肠埃希菌的生物膜的形成与其各类毒力基因有不同程度的相关性。
Objective:To study the association of Enteroaggregative Escherichia coli(EAggEC) virulence genes and bio-film formation.Methods: Biofilm formation test was used to screen EAgg EC and PCR was used to detect Agg R,AAT(CVD432),agga(Aggregative fimbria I),aafa(AAF/II),agg3a(AAF/III),pilS(Type IV pilus),pet(Plasmid-encoded toxin),eastA(EAggEC heat-stable toxin) genes and the relation between bio-film formation and virulence genes was analyzed.Results: Bio-film formation test can be used for screening of EAgg EC,which can be classified by virulence genotyping.Conclusion: Biofilm formation test is useful to screen Enteroaggregative Escherichia coli(EAggEC),and it has correlation with every virulence gene to varying degrees.
出处
《中国卫生检验杂志》
北大核心
2012年第7期1487-1490,1494,共5页
Chinese Journal of Health Laboratory Technology
关键词
聚集性大肠埃希菌
生物膜形成
毒力基因分型
Enteroaggregative Escherichia coli
Bio-film formation
Virulence genotype