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Subtractive inhibition assay for the detection of Campylobacter jejuni in chicken samples using surface plasmon resonance.
Scientific Reports ( IF 3.8 ) Pub Date : 2019-09-20 , DOI: 10.1038/s41598-019-49672-2 Noor Azlina Masdor 1, 2 , Zeynep Altintas 3 , Mohd Yunus Shukor 4 , Ibtisam E Tothill 1
Scientific Reports ( IF 3.8 ) Pub Date : 2019-09-20 , DOI: 10.1038/s41598-019-49672-2 Noor Azlina Masdor 1, 2 , Zeynep Altintas 3 , Mohd Yunus Shukor 4 , Ibtisam E Tothill 1
Affiliation
In this work, a subtractive inhibition assay (SIA) based on surface plasmon resonance (SPR) for the rapid detection of Campylobacter jejuni was developed. For this, rabbit polyclonal antibody with specificity to C. jejuni was first mixed with C. jejuni cells and unbound antibody was subsequently separated using a sequential process of centrifugation and then detected using an immobilized goat anti-rabbit IgG polyclonal antibody on the SPR sensor chip. This SIA-SPR method showed excellent sensitivity for C. jejuni with a limit of detection (LOD) of 131 ± 4 CFU mL-1 and a 95% confidence interval from 122 to 140 CFU mL-1. The method has also high specificity. The developed method showed low cross-reactivity to bacterial pathogens such as Salmonella enterica serovar Typhimurium (7.8%), Listeria monocytogenes (3.88%) and Escherichia coli (1.56%). The SIA-SPR method together with the culturing (plating) method was able to detect C. jejuni in the real chicken sample at less than 500 CFU mL-1, the minimum infectious dose for C. jejuni while a commercial ELISA kit was unable to detect the bacterium. Since the currently available detection tools rely on culturing methods, which take more than 48 hours to detect the bacterium, the developed method in this work has the potential to be a rapid and sensitive detection method for C. jejuni.
中文翻译:
使用表面等离子体共振检测鸡肉样品中空肠弯曲菌的减阻抑制法。
在这项工作中,开发了一种基于表面等离振子共振(SPR)的消减抑制分析(SIA),用于快速检测空肠弯曲菌。为此,首先将对空肠弯曲杆菌具有特异性的兔多克隆抗体与空肠弯曲杆菌细胞混合,然后使用顺序离心方法分离未结合的抗体,然后使用SPR传感器芯片上固定的山羊抗兔IgG多克隆抗体进行检测。该SIA-SPR方法显示出对空肠弯曲杆菌的出色灵敏度,检测限(LOD)为131±4 CFU mL-1,从122到140 CFU mL-1的置信区间为95%。该方法还具有很高的特异性。所开发的方法显示出与细菌性病原体的交叉反应性低,这些病原体例如肠炎沙门氏菌血清鼠伤寒沙门氏菌(7.8%),单核细胞增生性李斯特菌(3.88%)和大肠杆菌(1.56%)。SIA-SPR方法与培养(铺板)方法一起能够在小于500 CFU mL-1(空肠弯曲杆菌的最小感染剂量)的情况下检测真实鸡样品中的空肠弯曲杆菌,而商用ELISA试剂盒无法检测到空肠弯曲杆菌。检测细菌。由于当前可用的检测工具依赖于培养方法,该方法需要48多个小时才能检测出细菌,因此这项工作中开发的方法有可能成为空肠弯曲菌的快速,灵敏的检测方法。
更新日期:2019-09-21
中文翻译:
使用表面等离子体共振检测鸡肉样品中空肠弯曲菌的减阻抑制法。
在这项工作中,开发了一种基于表面等离振子共振(SPR)的消减抑制分析(SIA),用于快速检测空肠弯曲菌。为此,首先将对空肠弯曲杆菌具有特异性的兔多克隆抗体与空肠弯曲杆菌细胞混合,然后使用顺序离心方法分离未结合的抗体,然后使用SPR传感器芯片上固定的山羊抗兔IgG多克隆抗体进行检测。该SIA-SPR方法显示出对空肠弯曲杆菌的出色灵敏度,检测限(LOD)为131±4 CFU mL-1,从122到140 CFU mL-1的置信区间为95%。该方法还具有很高的特异性。所开发的方法显示出与细菌性病原体的交叉反应性低,这些病原体例如肠炎沙门氏菌血清鼠伤寒沙门氏菌(7.8%),单核细胞增生性李斯特菌(3.88%)和大肠杆菌(1.56%)。SIA-SPR方法与培养(铺板)方法一起能够在小于500 CFU mL-1(空肠弯曲杆菌的最小感染剂量)的情况下检测真实鸡样品中的空肠弯曲杆菌,而商用ELISA试剂盒无法检测到空肠弯曲杆菌。检测细菌。由于当前可用的检测工具依赖于培养方法,该方法需要48多个小时才能检测出细菌,因此这项工作中开发的方法有可能成为空肠弯曲菌的快速,灵敏的检测方法。