Vanderlinde P B, Shay B, Murray J
Commonwealth Scientific and Industrial Research Organisation, Division of Food Science and Technology, Brisbane Laboratory, Queensland, Australia.
J Food Prot. 1998 Apr;61(4):437-43. doi: 10.4315/0362-028x-61.4.437.
Two studies were undertaken to determine the microbiological of beef carcass meat and frozen boneless bulk packed beef produced in Australia. Samples were collected from 1,063 beef carcasses and from 929 cartons of frozen boneless bulk packed beef over a period of approximately 12 months. Samples were collected from works processing beef carcasses for the Australian domestic market and from works targeting export markets. On carcasses processed for export markets, where bacterial counts were obtained, the log10 mean of the APC (aerobic plate count) was 3.13 CFU/cm2, the geometric mean of the coliform count was 19 MPN/cm2, and the geometric mean of Escherichia coli was 13 MPN/cm2. A small percentage (0.59%) of export samples were found positive for Listeria monocytogenes, 0.16% were positive of r coagulase-positive for Campylobacter jejuni/coli, 0.22% were positive for Salmonella spp., and 29% were positive for coagulase-positive Staphylococcus spp. Bacterial numbers were lower on carcasses processed for export markets and higher carcasses chilled for more than 24 h. Escherichia coli O157 was recovered from 4 of 893 export carcasses tested (0.45%). Of the export frozen boneless bulk packed beef samples that tested positive, the log10 mean of the APC was 2.5 CFU/g, the geometric mean of the coliform count was 15 MPN/g, and the geometric mean number of e. coli was 15 MPN/g. Three of 787 export frozen samples (0.38%) tested positive for Salmonella spp., E. coli O157 was not isolated from any of the 685 export frozen samples tested for this bacteria. Export samples tested for this bacteria. Export samples on average had lower APCs than domestic samples. Results from both surveys are compared with data from similar studies in other countries.
开展了两项研究，以确定澳大利亚生产的牛胴体肉和冷冻去骨散装牛肉的微生物情况。在大约12个月的时间里，从1063头牛胴体和929箱冷冻去骨散装牛肉中采集了样本。样本采集自面向澳大利亚国内市场加工牛胴体的工厂以及面向出口市场的工厂。在为出口市场加工的胴体上（已获取细菌计数），需氧平板计数（APC）的log10平均值为3.13 CFU/cm2，大肠菌群计数的几何平均值为19 MPN/cm2，大肠杆菌的几何平均值为13 MPN/cm2。一小部分（0.59%）出口样本被检测出单核细胞增生李斯特菌呈阳性，0.16%的空肠弯曲菌/结肠弯曲菌r型凝固酶阳性呈阳性，0.22%的沙门氏菌属呈阳性，29%的凝固酶阳性葡萄球菌属呈阳性。在为出口市场加工的胴体上，细菌数量较少，而冷藏超过24小时的胴体上细菌数量较多。在893份检测的出口胴体中，有4份（0.45%）检出大肠杆菌O157。在检测呈阳性的出口冷冻去骨散装牛肉样本中，APC的log10平均值为2.5 CFU/g，大肠菌群计数 的几何平均值为15 MPN/g，大肠杆菌的几何平均值为15 MPN/g。787份出口冷冻样本中有3份（0.38%）沙门氏菌属检测呈阳性，在685份检测该细菌的出口冷冻样本中均未分离出大肠杆菌O157。对出口样本进行了该细菌检测。出口样本的APC平均低于国内样本。两项调查的结果均与其他国家类似研究的数据进行了比较。
