Biss M E, Hathaway S C
Regulatory Authority (Meat and Seafood), New Zealand Ministry of Agriculture.
Vet Rec. 1996 Jan 27;138(4):82-6. doi: 10.1136/vr.138.4.82.
Studies in four slaughterhouses with contrasting dressing systems showed that microbiological contamination with total aerobic bacteria and Escherichia coli was greater on carcases which had been washed before slaughter, irrespective of wool length, and was generally higher on carcases derived from woolly lambs than on those derived from shorn lambs. The effects of pre-slaughter washing on the forequarters compared with the hindquarters were not consistent, and this was attributed to differences between the dressing systems applied in the slaughterhouses. Over all trials the mean total aerobic count ranged from 3.45 to 5.36 log10/cm2, and the mean counts of E coli ranged from 0.39 to 2.11 log10/cm2. There was less visible contamination on the carcases of washed lambs than on those of unwashed lambs. The differences in contamination with wool were largely dependent on the level of contamination of individual carcases, whereas the differences in contamination with faecal material and dirt or sand were largely dependent on the prevalence of affected carcases. The use of pre-slaughter washing to compensate in visual terms for poor pre-slaughter presentation results in a detrimental effect on microbiological loads on ovine carcases.
在四个采用不同屠宰处理系统的屠宰场进行的研究表明，无论羊毛长度如何，屠宰前进行清洗的 carcasses（原文有误，应为 carcasses，意为屠体）上需氧菌总数和大肠杆菌的微生物污染程度更高，而且来自有毛羔羊的屠体上的污染通常高于来自剪毛羔羊的屠体。与后躯相比，屠宰前清洗对前躯的影响并不一致，这归因于屠宰场采用的屠宰处理系统之间的差异。在所有试验中，需氧菌总数的平均值在 3.45 至 5.36 log10/cm² 之间，大肠杆菌的平均计数在 0.39 至 2.11 log10/cm² 之间。清洗过的羔羊屠体上的可见污染比未清洗的羔羊屠体上的少。羊毛污染的差异很大程度上取决于单个屠体的污染水平，而粪便物质以及污垢或沙子污染的差异很大程度上取决于受影响屠体的比例。使用屠宰前清洗来在视觉上弥补屠宰前外观不佳的情况会对绵羊屠体的微生物负荷产生不利影响。
