Dempster J F
J Hyg (Lond). 1977 Feb;78(1):11-6. doi: 10.1017/s002217240005587x.
Cold water (10 degrees C) at ultra-high pressure (38-5--49 kg/cm2) was compared with (a) hot water 65-6--82.2 degrees C) at low pressure (4-2--5-6 kg/cm2) and (b) hot water containing a detergent (2% (w/v) sodium silicate). Seven sites were examined in a beef abattoir and six in a bacon factor. Three surfaces in the beef abattoir had lower residual colony counts (higher reductions) after hot water/low pressure than after cold water/high pressure. However, the differences were not significant (P greater than 0-05). The range of the mean log10 count/cm2 before cleaning was 4-02-5.15, and after cleaning 1-73-2.32 (hot water) and 1-9--2-85 (cold water). On three of the remaining sites, the three methods were compared. The total differences between treatments were not significant (P greater than 0-05), although there was an effect of surface and an interaction between surface and treatment. The cold water produced lower residual counts on three sites in the bacon factory than the hot water (45--54 degrees C). However, the differences were not significant on the remaining surfaces.
将10摄氏度的冷水在超高压（38 - 5至49千克/平方厘米）下与（a）65 - 6至82.2摄氏度的热水在低压（4 - 2至5 - 6千克/平方厘米）下以及（b）含有洗涤剂（2%（w/v）硅酸钠）的热水进行比较。在一个牛肉屠宰场检查了7个部位，在一个培根加工厂检查了6个部位。牛肉屠宰场的三个表面在热水/低压处理后的残留菌落数低于冷水/高压处理后（减少量更高）。然而，差异不显著（P大于0.05）。清洁前每平方厘米对数计数的平均值范围为4.02至5.15，清洁后热水处理为1.73至2.32，冷水处理为1.9至2.85。在其余的三个部位比较了三种方法。尽管存在表面效应以及表面与处理之间的相互作用，但处理之间的总体差异不显著（P大于0.05）。在培根加工厂的三个部位，冷水产生的残留计数低于45至54摄氏度的热水。然而，在其余表面差异不显著。
