Kaartinen L, Pyörälä S
Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Helsinki, Finland.
J Dairy Res. 1989 Nov;56(5):719-25. doi: 10.1017/s0022029900029289.
The activity of milk plasmin, plasminogen and N-acetyl-beta-glucosaminidase (NAGase) and the trypsin-inhibitor capacity (TIC) were monitored in 40 quarters during the first month of lactation. TIC and NAGase activity decreased rapidly and plasmin activity more slowly during the first week. Conversely milk plasminogen increased as time elapsed from parturition. When the quality of whey was analysed as a growth medium for mastitis pathogens, a slight inhibition in the growth of Escherichia coli, Staphylococcus aureus and Streptococcus agalactiae was seen at the day of parturition. There was a distinct stimulatory effect on the growth of Str. agalactiae during the second week of lactation. No relationship was found between in vitro bacterial growth and respective plasmin or plasminogen activity in milk.
在泌乳的第一个月，对40个乳腺的乳纤溶酶、纤溶酶原、N-乙酰-β-氨基葡萄糖苷酶（NAGase）活性以及胰蛋白酶抑制能力（TIC）进行了监测。在第一周，TIC和NAGase活性迅速下降，纤溶酶活性下降较慢。相反，从分娩开始，乳纤溶酶原随时间增加。当分析乳清作为乳腺炎病原体生长培养基的质量时，在分娩当天观察到对大肠杆菌、金黄色葡萄球菌和无乳链球菌的生长有轻微抑制。在泌乳的第二周，对无乳链球菌的生长有明显的刺激作用。未发现体外细菌生长与牛奶中相应的纤溶酶或纤溶酶原活性之间存在关联。
