Improved quantitative detection of VBNC Vibrio parahaemolyticus using immunomagnetic separation and PMAxx-qPCR
Improved quantitative detection of VBNC Vibrio parahaemolyticus using immunomagnetic separation and PMAxx-qPCR
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使用免疫磁分离和 PMAxx-qPCR 改进 VBNC 副溶血弧菌的定量检测
DOI:
10.1016/j.foodcont.2019.106962
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发表时间:
2020-04
期刊:
影响因子:
6
通讯作者:
Li Wang
中科院分区:
文献类型:
--
作者:
Lichao Zhao;Xinrui Lv;Xiao Cao;Jingfeng Zhang;Xiaokui Gu;Haiyan Zeng;Li Wang
Immunomagnetic separation (IMS) is an effective method for specific enrichment and purification of target food-borne pathogens from complex food samples. To detect viable but non-culturable (VBNC)Vibrio parahaemolyticus(V. parahaemolyticus) with greater accuracy and sensitivity, we used an improved propidium monoazide (PMAxx) dye to eliminate dead cell interference in an IMS-PMAxx-real-time (quantitative) polymerase chain reaction (IMS-PMAxx-qPCR) assay. We prepared immunomagnetic beads (IMBs) using streptavidin-conjugated magnetic nanoparticles and biotinylated polyclonal antibodies, and optimized the reaction conditions to establish an IMS method for VBNCV. parahaemolyticus. We determined the optimal antibody amount (30 μg), IMBs volume (150 μL), incubation time (45 min), immunomagnetic separation time (4 min), and separation temperature (25 °C). The IMS-PMAxx-qPCR method could detect VBNCV. parahaemolyticusin raw shrimp samples at levels as low as 1.85 CFU/g without any pre-enrichment. The IMS-PMAxx-qPCR assay is highly sensitive, selective, simple, and rapid (<4 h), and outperformed the conventional PCR based assays. Thus, this method can potentially improve rapid detection of VBNCV. parahaemolyticusin raw shrimp.
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影响因子:
3.7
作者:
Han H;Li F;Yan W;Guo Y;Li N;Liu X;Zhu J;Xu J;Chen Y;Li X;Lv H;Zhang Y;Cai T;Chen Y
通讯作者:
Chen Y
影响因子:
5.7
作者:
Keserue HA;Baumgartner A;Felleisen R;Egli T
通讯作者:
Egli T
影响因子:
6
作者:
Xu, Feng;Lai, Weihua;Xiong, Yonghua;Wei, Hua
通讯作者:
Wei, Hua
影响因子:
6
作者:
Xu, Xiaoke;Wu, Qingping;Wu, Kui
通讯作者:
Wu, Kui
DOI:
10.1016/j.ijfoodmicro.2017.11.011
发表时间:
2018-02-02
影响因子:
5.4
作者:
Randazzo, Walter;Khezri, Mohammad;Sanchez, Gloria
通讯作者:
Sanchez, Gloria