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Comparison of aerial counts at different sites in beef and sheep abattoirs and the relationship between aerial and beef carcass contamination

机译：牛肉和绵羊屠宰场不同地点的空中计数比较以及空中和牛car体污染之间的关系

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摘要

The study examined and compared levels of aerial contamination in commercial beef and sheep plants at four sites, i.e. lairage, hide/fleece pulling, evisceration and chilling. Aerial contamination was determined by impaction and sedimentation onto Plate Count Agar to enumerate Total Viable Counts, MacConkey Agar to enumerate coliforms and Violate Red Bile Glucose Agar to enumerate Enterobacteriaceae. AS I cannot see any difference in the text here - I am not sure what the change is?. The levels of aerial contamination were similar at equivalent sites in beef and sheep plants, irrespective of the sampling method or the type of organisms recovered. Mean log counts recovered on each medium in the chillers were generally significantly lower (P < .05) than the corresponding mean log numbers recovered at the other three sites. The relationship between impaction (air) and sedimentation (surface) counts could be described by the surface to air ratio (SAR) which in this study had an R~2 of 0.77. Further studies in an experimental plant compared counts recovered from the neck of beef carcasses with aerial counts determined by impaction and sedimentation onto agar and irradiated meat pieces. A relationship between counts on beef carcasses and in the air could not be established, irrespective of the method used to compare counts.
机译：这项研究检查并比较了商业牛肉和绵羊植物在四个地方的空气污染水平，即四个地方：草皮，生皮/羊毛起绒，内脏和冷藏。空气污染的测定方法是：在平板计数琼脂上计数和计数总活菌数，在麦康凯琼脂上计数大肠菌群，并在违规的红色胆汁葡萄糖琼脂上计数肠杆菌科来确定空气污染。因为我看不到此处的任何区别-我不确定更改是什么？不论采样方法或回收的生物类型如何，在牛肉和绵羊植物中，等效场所的空气污染水平相似。在冷却器中，每种介质上回收的平均对数计数通常显着低于其他三个站点上回收的相应平均对数（P <0.05）。撞击（空气）和沉降（表面）计数之间的关系可以用地表空气比（SAR）描述，在本研究中，R〜2为0.77。在实验工厂中进行的进一步研究将从牛肉car体颈部回收的计数与通过撞击和沉淀在琼脂和辐照的肉块上确定的空中计数进行了比较。不管用于比较计数的方法如何，都无法建立牛肉car体与空气中计数之间的关系。

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  • 来源
    《Food microbiology》 |2012年第2期|p.325-331|共7页
  • 作者

    Wioletta Okraszska-Lasica; D.J. Bolton; J.J. Sheridan; DA McDowell;

  • 作者单位

    Ashtown Food Research Centre, Teagasc, Ashtown, Dublin, Ireland;

    Ashtown Food Research Centre, Teagasc, Ashtown, Dublin, Ireland;

    Ashtown Food Research Centre, Teagasc, Ashtown, Dublin, Ireland;

    School of Health Sciences, University of Ulster, Newtownabbey, Co. Antrim, Northern Ireland, United Kingdom;

  • 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

    aerial contamination; abattoirs; beef; sheep; carcasses;

    机译：空气污染;屠宰场;牛肉;绵羊;屠体;

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