Arthur Terrance M, Bosilevac Joseph M, Brichta-Harhay Dayna M, Kalchayanand Norasak, Shackelford Steven D, Wheeler Tommy L, Koohmaraie Mohammad
U.S. Department of Agriculture, Agricultural Research Service, Roman L. Hruska U.S. Meat Animal Research Center, Clay Center, Nebraska 68933-0166, USA.
J Food Prot. 2007 May;70(5):1076-9. doi: 10.4315/0362-028x-70.5.1076.
Harborage of Escherichia coli O157:H7 and Salmonella on animal hides at slaughter is the main source of beef carcass contamination during processing. Given this finding, interventions have been designed and implemented to target the hides of cattle following entry into beef processing plants. Previous interventions targeting hides have not been suitable for all beef processing plants because of cost and space restrictions. In this study, a hide wash cabinet was evaluated to determine whether it was more amenable to widespread use in the beef processing industry, especially for small and medium-size plants. Overall, 101 (35.1%) of 288 beef cattle hides sampled before entry into the hide wash cabinet harbored E. coli O157:H7 at or above the limit of detection (40 CFU/100 cm2). After passage through the hide wash cabinet, only 38 (13.2%) of 288 hides had E. coli O157:H7 levels > or =40 CFU/100 cm2. Before the hide wash cabinet, 50 (17%) of 288 hides harbored E. coli O157:H7 at levels above 100 CFU/100 cm2, with one sample as high as 20,000 CFU/100 cm2. In contrast, only 14 (5%) of 288 hides had E. coli O157:H7 levels above 100 CFU/100 cm2 after hide washing, with the highest being 2000 CFU/100 cm2. These same trends also were found for Salmonella before and after hide washing. These results indicate that the hide wash cabinet described in this study was effective and should provide small and medium-size processing plants with an affordable hide wash intervention strategy.
屠宰时动物皮张上大肠杆菌O157:H7和沙门氏菌的隐匿是牛肉加工过程中牛胴体污染的主要来源。基于这一发现，已设计并实施了针对进入牛肉加工厂后牛的皮张的干预措施。以往针对皮张的干预措施由于成本和空间限制并不适用于所有牛肉加工厂。在本研究中，对一种皮张清洗柜进行了评估，以确定其是否更适合在牛肉加工行业广泛使用，尤其是中小型工厂。总体而言，在进入皮张清洗柜之前采集的288张肉牛皮张中，有101张（35.1%）带有大肠杆菌O157:H7，且达到或高于检测限（40 CFU/100 cm2）。经过皮张清洗柜处理后，288张皮张中只有38张（13.2%）的大肠杆菌O157:H7水平≥40 CFU/100 cm2。在进入皮张清洗柜之前，288张皮张中有50张（17%）的大肠杆菌O157:H7水平高于100 CFU/100 cm2，其中一个样本高达20,000 CFU/100 cm2。相比之下，清洗后288张皮张中只有14张（5%）的大肠杆菌O157:H7水平高于100 CFU/100 cm2，最高为2000 CFU/100 cm2。皮张清洗前后沙门氏菌也呈现出相同的趋势。这些结果表明，本研究中描述的皮张清洗柜是有效的，应为中小型加工厂提供一种经济实惠的皮张清洗干预策略。
