RapidChek SELECT检测食品中沙门菌方法的评价
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(国家食品安全风险评估中心 卫生部食品安全风险评估重点实验室,北京 100021)

作者简介:

闫韶飞 男 助理研究员 研究方向为食品微生物 E-mail:yanshaofei@cfsa.net.cn

通讯作者:

李凤琴 女 研究员 研究方向为食品微生物 E-mail:lifengqin@cfsa.net.cn

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基金项目:

国家食品安全风险评估中心青年科研基金项目(2014009)


Evaluation of RapidChek SELECT method for detection of Salmonella in foods
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(Key Laboratory of Food Safety Risk Assessment of Ministry of Health, China National Center for Food Safety Risk Assessment, Beijing 100021, China)

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    摘要:

    评价RapidChek SELECT方法对食品中沙门菌的检测效果并验证。方法 用添加并回收沙门菌标准菌株方法验证RapidChek SELECT的检测限,添加非沙门菌标准菌株方法测定其特异性,以国标法为参比,通过检测实际样品,对RapidChek SELECT方法进行验证。结果 ①RapidChek SELECT沙门菌检测试纸条的检测限为1 cfu/25 g(或1 cfu/ml);②与10种非沙门菌无交叉反应特异性;③直接检测食品中沙门菌的最低浓度为106 cfu/ml;④对实际样品中沙门菌的检测结果显示,RapidChek SELECT方法和国标方法阳性率分别为87.5%(35/40)和85%(34/40),两种方法最终检测结果的符合率为97.5%(39/40),RapidChek SELECT方法等同于国标方法。结论 与国标方法相比,RapidChek SELECT沙门菌检测试剂盒灵敏度高、特异性强、操作简便,有效减少非沙门菌的干扰、省时,适用于食品中沙门菌的快速检测。

    Abstract:

    To evaluate and validate the performance of the RapidChek SELECT method for rapid detection of Salmonella in foods.Methods The limit of detection (LOD) and the specificity of RapidChek SELECT method were assessed by spiking Salmonella and non-Salmonella reference cultures into different food matrix, respectively. Meanwhile, RapidChek SELECT methodwas validated via examining Salmonella contamination in food samples in comparison with the China national standardmethod. Results The limit of detection of RapidChek SELECT method were 1 cfu/25 g or 1 cfu/ml. The RapidChek SELECT method showed good specificity and no cross-reactivity in determination of 10 kinds of non-Salmonella reference strains. The lowest cell density of Salmonella in food samples for direct detection by RapidChek strip was 106 cfu/ml. Of the 40 food samples examined, 87.5% (35/40) and 85% (34/40) were positive for Salmonella examined by RapidChek SELECT method and China national standardmethod, respectively. A good coincidence in the results obtained by both methods was observed (97.5%, 39/40). RapidChek SELECT method exhibits a slightly better proficiency than China national standardmethod.Conclusion The RapidChek SELECT is an effective alternative analytical method with characteristics of high sensitivity, specificity, easy-to-use, lower interference from non-Salmonella, time-saving, and suitable for rapid detection of Salmonella in foods.

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闫韶飞,王伟,胡豫杰,徐进,赫英英,李凤琴. RapidChek SELECT检测食品中沙门菌方法的评价[J].中国食品卫生杂志,2015,27(2):144-149.

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  • 在线发布日期: 2015-05-11
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