Bijker P G, Koolmees P A, Fransen T, Dekker J L
Tijdschr Diergeneeskd. 1981 Sep 15;106(8):924-32.
Three trials were made, in which mammary tissues obtained under hygienic conditions were stored together with discharged milk at 4 degrees and 20 degrees C. Bacteriological, histological, organoleptic and pH studies were done to assess the keeping qualities and spoilage of these tissues. The results of these studies showed that mammary tissues stored at 4 degrees C together with discharged milk will remain stable for a maximum period of four days. Inadequate chilling or failure to chill (as is often the case on storage in receptacles in the field) is inadmissible because of spoilage (one day) and the rapid growth of Staphylococcus aureus. The discharged milk stored along with the mammary tissues will have an adverse effect on the keeping qualities of the tissues. Spoilage of mammary tissues may occur as well in the superficial layer as in the deeper layers as both the surface and the subjacent tissues harbour bacteria. Penetration of bacteria from the surface to the deeper tissues does not occur. The paper concludes with recommendations based on previous studies and above mentioned investigation regarding good manufacturing practices where the production, storage and treatment of bovine udders are concerned.
进行了三项试验，在卫生条件下获取的乳腺组织与挤出的牛奶一起分别保存在4摄氏度和20摄氏度下。开展了细菌学、组织学、感官和pH值研究，以评估这些组织的保存质量和变质情况。这些研究结果表明，乳腺组织与挤出的牛奶一起保存在4摄氏度时，最长可保持四天稳定。由于变质（一天）以及金黄色葡萄球菌的快速生长，制冷不足或未制冷（如在田间容器中储存时经常出现的情况）是不可接受的。与乳腺组织一起储存的挤出牛奶会对组织的保存质量产生不利影响。乳腺组织的变质可能发生在表层和深层，因为表层和下层组织都含有细菌。细菌不会从表面渗透到深层组织。本文基于先前的研究以及上述关于奶牛乳房生产、储存和处理的良好生产规范的调查给出了建议。
