以减少冷却后牛胴体表面的微生物数量为目标，在企业实际生产条件下，以菌落总数为指标分析屠宰过程中各工序胴体表面的微生物变化状况，探讨不同喷淋方式的减菌效果。结果表明，屠宰工序中初始剥皮操作对胴体造成的污染最严重，其次为去脏工序。高压清水清洗对全胴体的减菌量为0．62（log10CFU／cm^2）；2％的乳酸喷淋对胸口部位菌落总数的减少量为1．06（log10 CFU／cm^2）。采用2％的乳酸喷淋可以有效减少肉牛屠宰过程中的胴体污染。%For the purpose of reducing the microbiological counts in chilled beef carcasses, in the commercial conditions, the microbiological conditions of slaughtered process was surveyed, and the effects of different kinds of spraying was studied. Results indicated that the operation of dehiding was deleted the most contamination to the beef carcasses in the slaughtered process, the second was the operation of evisceration. The reduction of microbiological counts in beef carcasses when sprayed with water was 0.62 （log10CFU/cm2） , while spraying with 2% lactic acid reduced numbers of bacteria on brisket was 1.06 （log10CFU/cm2）. And spraying with 2% lactic acid during slaughter is an effective decontamination method for beef slaughtering.
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