Hudson W R, Mead G C, Hinton M H
Division of Food Animal Science, University of Bristol, Langford.
Vet Rec. 1996 Dec 14;139(24):587-9.
Eleven beef abattoirs were visited, each on five separate occasions. On each occasion, an audit was carried out according to the official Hygiene Assessment System (HAS) and 10 carcases were sampled at four different sites to assess total viable counts and counts of presumptive coliform bacteria. The HAS scores ranged from 11 to 84 (maximum 100), and the logarithmic mean total viable counts for all sampling sites on each batch of carcases varied between 1.98 and 4.14 colony forming units/cm2. The mean prevalence of coliform contamination ranged from 0 to 85 per cent. There was a significant negative correlation (P < 0.001) between the mean HAS scores and the mean total viable count for each abattoir, but not between the HAS scores and the numbers of coliforms. Within the HAS, the mean scores for all five categories, before weighting, showed a significant correlation with the mean total viable count (P < 0.001); however, the categories concerned with slaughter and dressing, and personnel and practices were of most value in determining trends in carcase contamination. A new advisory classification is proposed for levels of microbial contamination on beef carcases.
研究人员走访了11家牛肉屠宰场，每家屠宰场各走访5次。每次走访时，均依据官方卫生评估系统（HAS）进行审核，并在4个不同部位采集10具牛胴体样本，以评估总活菌数和推测性大肠菌群数。HAS评分范围为11至84（满分100），每批牛胴体所有采样部位的对数平均总活菌数在1.98至4.14菌落形成单位/平方厘米之间。大肠菌群污染的平均发生率在0%至85%之间。各屠宰场的平均HAS评分与平均总活菌数之间存在显著负相关（P < 0.001），但HAS评分与大肠菌群数之间不存在显著相关性。在HAS系统中，加权前所有五个类别的平均评分与平均总活菌数均呈现显著相关性（P < 0.001）；然而，与屠宰、修整以及人员和操作相关的类别在确定牛胴体污染趋势方面最具价值。本文提出了一种针对牛肉胴体微生物污染水平的新的咨询分类方法。
