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首页> 外文期刊>Applied Microbiology >Decontamination Effect of the Spindle and 222-Nanometer Krypton-Chlorine Excimer Lamp Combination against Pathogens on Apples (Malus domestica Borkh.) and Bell Peppers (Capsicum annuum L.)
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Decontamination Effect of the Spindle and 222-Nanometer Krypton-Chlorine Excimer Lamp Combination against Pathogens on Apples (Malus domestica Borkh.) and Bell Peppers (Capsicum annuum L.)

机译：主轴和222纳米K氯准分子灯组合对苹果（Malus domestica Borkh。）和甜椒（Capsicum annuum L.）病原体的去污效果。

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In this study, we developed a washing system capable of decontaminating fresh produce by combining the Spindle apparatus, which detaches microorganisms on sample surfaces, and a 222-nm krypton-chlorine excimer lamp (KrCl excilamp) (Sp-Ex) and investigated their decontamination effect against Escherichia coli O157:H7, Salmonella enterica serovar Typhimurium, and Listeria monocytogenes on apple (Malus domestica Borkh.) and bell pepper (Capsicum annuum L.) surfaces. Initial levels of the three pathogens were approximately 108 CFU/sample. Both E. coli O157:H7 and S. Typhimurium were reduced to below the detection limit (2.0 log CFU/sample) after 5 and 7?min of treatment on apple and bell pepper surfaces, respectively. The amounts of L. monocytogenes on apple and bell pepper surfaces were reduced by 4.26 and 5.48 logs, respectively, after 7?min of treatment. The decontamination effect of the Sp-Ex was influenced by the hydrophobicity of the sample surface as well as the microbial cell surface, and the decontamination effect decreased as the two hydrophobicity values increased. To improve the decontamination effect of the Sp-Ex, Tween 20, a surfactant that weakens the hydrophobic interaction between the sample surface and pathogenic bacteria, was incorporated into Sp-Ex processing. It was found that its decontamination effect was significantly (P?0.05) increased by the addition of 0.1% Tween 20. Sp-Ex did not cause significant quality changes in apple or bell pepper surfaces during 7?days storage following treatment (P?>?0.05). Our results suggest that Sp-Ex could be applied as a system to control pathogens in place of chemical sanitizer washing by the fresh-produce industry.IMPORTANCE Although most fresh-produce processing currently controls pathogens by means of washing with sanitizers, there are still problems such as the generation of harmful substances and changes in product quality. A combination system composed of the Spindle and a 222-nm KrCl excilamp (Sp-Ex) developed in this study reduced pathogens on apple and bell pepper surfaces using sanitizer-free water without altering produce color and texture. This study demonstrates the potential of the Sp-Ex to replace conventional washing with sanitizers, and it can be used as baseline data for practical application by industry. In addition, implementation of the Sp-Ex developed in this study is expected not only to meet consumer preference for fresh, minimally processed produce but also to reduce human exposure to harmful chemicals while being beneficial to the environment.
机译：在这项研究中，我们开发了一种洗涤系统，该系统可以通过结合用于分离样品表面微生物的Spindle设备和222 nm k氯准分子灯（KrCl excilamp）（Sp-Ex）来对新鲜农产品进行净化，并对其进行净化处理对苹果（Malus domestica Borkh。）和甜椒（Capsicum annuum L.）表面上的大肠杆菌O157：H7，肠炎沙门氏菌血清型鼠伤寒沙门氏菌和单核细胞增生性李斯特菌具有抗药性。三种病原体的初始水平约为108 CFU /样品。在苹果和甜椒表面分别处理5和7分钟后，大肠杆菌O157：H7和鼠伤寒沙门氏菌均降至检测限以下（2.0 log CFU /样品）。处理7分钟后，苹果和甜椒表面单核细胞增生李斯特菌的量分别减少了4.26和5.48对数。 Sp-Ex的去污效果受样品表面以及微生物细胞表面的疏水性影响，并且随着两个疏水性值的增加，去污效果降低。为了改善Sp-Ex的去污效果，将吐温20（一种弱化样品表面与病原菌之间的疏水相互作用的表面活性剂）掺入Sp-Ex处理中。发现通过添加0.1％Tween 20，其去污效果显着提高（P <0.05）。Sp-Ex在处理后的7天存储期间未引起苹果或甜椒表面质量的显着变化（P> 0.05）。我们的结果表明Sp-Ex可以代替生鲜行业的化学消毒剂洗涤而被用作控制病原体的系统。重要提示尽管目前大多数新鲜产品加工都通过用消毒剂洗涤来控制病原体，但仍然存在问题例如有害物质的产生和产品质量的变化。在这项研究中开发的由锭子和222 nm KrCl准分子（Sp-Ex）组成的组合系统使用不含消毒剂的水减少了苹果和甜椒表面的病原体，而不会改变产品的颜色和质地。这项研究证明了Sp-Ex可以用消毒剂代替常规洗涤的潜力，并且可以用作行业实际应用的基准数据。此外，预期该研究中开发的Sp-Ex的实施不仅可以满足消费者对新鲜，最少加工产品的偏爱，而且还可以减少人类对有害化学物质的接触，同时有益于环境。

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