Pekkanen T J, Soback S
Nord Vet Med. 1977 Oct;29(10):436-9.
Twenty raw farm milk samples were tested for inhibitory substances before and after being kept at room temperature until the pH fell to less than 6.3 but greater than 6.2. The tests were done using the IDF-method and the commercial Thermocult method. In both methods B. stearothermophilus var. chalidolactis is used as the test organism. In two instances a thermostable inhibitor was produced with an inhibitory potential greater than 0.01 IU/ml penicillin standard. The IDF-method was found unsuitable for the study of relatively small concentrations of antibiotics or other chemotherapeutics in milk.
对20份生鲜农场牛奶样品在室温下保存至pH值降至低于6.3但高于6.2之前和之后进行了抑制物质检测。检测采用国际乳品联合会（IDF）方法和商业用嗜热脂肪芽孢杆菌培养基（Thermocult）方法。两种方法均使用嗜热栖热放线菌嗜热栖热变种作为测试微生物。在两个实例中产生了一种热稳定抑制剂，其抑制潜力大于0.01 IU/ml青霉素标准。发现IDF方法不适用于研究牛奶中相对低浓度的抗生素或其他化学治疗剂。
