New South Wales Department of Primary Industries, 1243 Bruxner Highway, Wollongbar, NSW 2478, Australia.
Meat Sci. 2012 Dec;92(4):837-40. doi: 10.1016/j.meatsci.2012.07.010. Epub 2012 Jul 22.
This study aimed to measure the amount of microbial contamination caused by inspecting the lymph nodes of adult sheep carcasses for caseous lymphadenitis (CLA). Surface swabs from carcasses pre-inspection (N=296) and post-inspection (N=296) were obtained for enumeration of indicator organisms at three commercial abattoirs. At the scapular site, inspection doubled the probability of detecting E. coli (Pr before=0.35, Pr after=0.67) and increased the expected count of E. coli from 2 cfu/cm² to 13 cfu/cm². Inspection at the rump site increased the probability of detecting E. coli by 1.1 times (Pr before=0.84, Pr after=0.93) and increased the expected count from 32 cfu/cm² to 45 cfu/cm². Effects were also observed for Enterobacteriaceae and total viable count. The findings show that routine inspection of adult sheep carcasses for CLA has a detrimental impact on carcass microbiological traits.
本研究旨在测量检查成羊尸体的干酪样淋巴结以检测干酪样淋巴结炎 (CLA) 时引起的微生物污染程度。在三个商业屠宰场，从预检查（N=296）和后检查（N=296）的尸体中采集表面拭子，以对指示菌进行计数。在肩胛部位，检查使大肠杆菌的检出概率增加了一倍（Pr 之前=0.35，Pr 之后=0.67），并将大肠杆菌的预期计数从每平方厘米 2 个 cfu 增加到每平方厘米 13 个 cfu。在臀部部位的检查使大肠杆菌的检出概率增加了 1.1 倍（Pr 之前=0.84，Pr 之后=0.93），并将预期计数从每平方厘米 32 个 cfu 增加到每平方厘米 45 个 cfu。肠杆菌科和总活菌计数也观察到了同样的效果。研究结果表明，对成羊尸体进行常规 CLA 检查会对胴体微生物特性产生不利影响。
