Alberta Agriculture and Rural Development, Agriculture Centre, 5401 1st Avenue S, Lethbridge, Alberta T1J 4V6, Canada.
J Food Prot. 2013 Jul;76(7):1250-4. doi: 10.4315/0362-028X.JFP-12-527.
Due to the expense of monitoring multiple serotypes of Escherichia coli at slaughter, a study was conducted at a beef abattoir in southern Alberta to determine relationships between E. coli and E. coli O157:H7 on hides. Swab samples were collected from carcasses immediately prior to hide removal over 8 weeks in summer (n = 591) and winter (n = 686). Detection of E. coli was highest in summer (P < 0.05), although detection of E. coli O157:H7 did not differ by season. Numbers of E. coli did not vary by season, but were affected by slaughter plant hygiene schedules. E. coli O157:H7 was more likely (P < 0.001) to be detected on hides of carcasses with the most E. coli (>3.5 log CFU/50 cm²). For E. coli < 3.5 log CFU/50 cm², the likelihood of detecting E. coli O157:H7 did not differ. Consequently, for 83% of carcasses, there was no relationship between numbers of E. coli and detection of E. coli O157:H7 on hides.
由于在屠宰时监测多种大肠杆菌血清型的费用较高，因此在艾伯塔省南部的一家牛肉屠宰场进行了一项研究，以确定皮上大肠杆菌和大肠杆菌 O157：H7 之间的关系。在夏季（n = 591）和冬季（n = 686）的 8 周内，在去除皮之前立即从胴体上采集拭子样本。尽管季节对大肠杆菌 O157：H7 的检测没有影响，但夏季大肠杆菌的检测率最高（P < 0.05）。大肠杆菌的数量不因季节而异，但受屠宰场卫生计划的影响。大肠杆菌 O157：H7 更有可能（P < 0.001）在大肠杆菌数量最多（>3.5 log CFU/50 cm²）的胴体皮上被检测到。对于大肠杆菌 < 3.5 log CFU/50 cm²，检测到大肠杆菌 O157：H7 的可能性没有差异。因此，对于 83%的胴体，大肠杆菌数量与皮上大肠杆菌 O157：H7 的检测之间没有关系。
