鸭疫里默菌环介导等温扩增检测方法的建立
发布时间:2018-07-26 20:01
【摘要】:采用对应于鸭疫里默菌16SrRNA基因442~461bp序列的5条特异引物,建立了环介导等温扩增(LAMP)反应体系,加入试剂盒提取的鸭疫里默菌DNA后,置63℃反应60min,通过监测反应液浊度判断结果。在此基础上,用煮沸10min的方法代替试剂盒提取DNA方法,并用显色方法代替浊度检测和琼脂糖凝胶电泳方法判断结果,通过敏感性、特异性、病原消长规律试验验证方法的准确性。另外,对临床采集的135只患病鸭的心血、脑组织、肝脏和心脏共540份样品提取DNA后,用LAMP和PCR进行检测,同时进行细菌分离和鉴定,比较各种方法检测结果的符合率。结果显示,菌液提取DNA后,LAMP和PCR方法最低分别可检测到2和10个CFU的鸭疫里默菌。菌液煮沸代替试剂盒提取DNA方法,使LAMP的敏感性降低5倍。显色法、浊度检测和琼脂糖凝胶电泳方法判断结果的敏感性和特异性相同。细菌分离法共获得201株鸭疫里默菌,且经LAMP与PCR法检测均呈阳性,LAMP与PCR法检出阳性样本总数分别为271和254份,LAMP方法阳性检出率高于PCR方法。建立的鸭疫里默菌LAMP检测方法具有较高的敏感性,进一步用菌液煮沸方法代替DNA提取法虽然使敏感性降低5倍,但节省了DNA提取步骤,再结合显色技术使反应结果直观可见,使其临床应用更加便捷。
[Abstract]:Using five specific primers corresponding to the 442~461bp sequence of 16SrRNA gene of Riemer duck, an isothermal amplified (LAMP) reaction system was established. After adding the DNA extracted from the kit, the reaction was carried out at 63 鈩,
本文编号:2147133
[Abstract]:Using five specific primers corresponding to the 442~461bp sequence of 16SrRNA gene of Riemer duck, an isothermal amplified (LAMP) reaction system was established. After adding the DNA extracted from the kit, the reaction was carried out at 63 鈩,
本文编号:2147133
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