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首页> 外文期刊>Food microbiology >Transfer of foodborne pathogens during mechanical slicing and their inactivation by levulinic acid-based sanitizer on slicers
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Transfer of foodborne pathogens during mechanical slicing and their inactivation by levulinic acid-based sanitizer on slicers

机译：机械切片过程中食源性病原体的转移以及切片机上基于乙酰丙酸的消毒剂使其灭活

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摘要

This study investigated the degree of cross-contamination between deli foods and slicers by Listeria monocytogenes, Salmonella, and Escherichia coli O157:H7, and their inactivation by levulinic acid (LA) plus sodium dodecyl sulfate (SDS) on slicers. The transfer rate of pathogens at 5 locations on the contaminated slicers (scenario Ⅰ) and on food slices (scenario Ⅱ) was determined. The antimicrobial efficacy of the LA + SDS sanitizers applied either as a liquid or as foam at three concentrations (0.5% LA + 0.05% SDS, 1% LA + 0.1% SDS, and 2% LA + 0.5% SDS) was determined for decontamination of the pathogens on the slicers at 21 ℃. After slicing 10 slices, the pathogens recovered from slicer blades were significantly (P < 0.05) less than the recovery from some other contact locations (scenario Ⅰ). With an initial inoculum at approximately 8.5 log CFU/blade, the populations of the pathogens transferred from blades to slices decreased logarithmically (R~2 ＞ 0.9, scenario Ⅱ). Contaminated slicer surfaces sprayed with 1% LA plus 0.1% SDS as a foam (45-55 psi) reduced within 1 min 6.0 to 8.0 log CFU/blade of the pathogens. Results revealed that cross-contamination can occur between deli foods and slicers. Also, LA-based sanitizer applied as foam can be a useful treatment to remove microbial contamination on the slicers.
机译：本研究调查了单核细胞增生李斯特菌，沙门氏菌和大肠杆菌O157：H7对熟食食品和切片机的交叉污染程度，以及乙酰丙酸（LA）和十二烷基硫酸钠（SDS）对切片机的钝化作用。确定了在污染切片机（方案Ⅰ）和食品切片（方案Ⅱ）上5个位置的病原体转移率。确定了三种浓度（0.5％LA + 0.05％SDS，1％LA + 0.1％SDS和2％LA + 0.5％SDS）以液体或泡沫形式使用的LA + SDS消毒剂的抗菌功效。切片机上21℃的病原体。切片10片后，从切片机叶片中回收的病原体比从其他一些接触位置（方案Ⅰ）回收的病原体明显少（P <0.05）。在初始接种量约为8.5 log CFU /叶片的情况下，从叶片转移到切片的病原体数量呈对数递减趋势（R〜2＞ 0.9，场景Ⅱ）。用1％LA加0.1％SDS作为泡沫（45-55 psi）喷涂的污染切片机表面在1分钟内减少了6.0至8.0 log CFU /病原体叶片。结果表明，熟食和切片机之间可能发生交叉污染。同样，用作泡沫的LA基消毒剂可以作为去除切片机上微生物污染的有用方法。

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  • 来源
    《Food microbiology》 |2014年第4期|263-269|共7页
  • 作者

    Dong Chen; Tong Zhao; Michael P. Doyle;

  • 作者单位

    Center for Food Safety, College of Agricultural and Environmental Sciences, University of Georgia, 1109 Experiment Street, Griffin, GA 30223, USA;

    Center for Food Safety, College of Agricultural and Environmental Sciences, University of Georgia, 1109 Experiment Street, Griffin, GA 30223, USA;

    Center for Food Safety, College of Agricultural and Environmental Sciences, University of Georgia, 1109 Experiment Street, Griffin, GA 30223, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Slicer; Deli; Transfer; Levulinic acid; Listeria; Salmonella; Escherichia coli;

    机译：切片机;熟食店;传递;乙酰丙酸;李斯特菌;沙门氏菌;大肠杆菌;

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