Nesbakken T
Nord Vet Med. 1976 Nov;28(11):550-6.
Weekly milk samples were taken from mammary halves from 30 goats from 8 different herds each with from 2 to 5 experimental animals throughout their lactation periods. The physiological variations in the cell counts of goats milk during lactation were investigated by a projection microscope. Only small variations were found in the average cell counts in milk samples from goats in the same herd, but big variations from one herd to another (Table I and Fig. 3.). The curves of the average cell counts in milk samples of 5 herds showed a rise at the beginning of the season at pasture (Fig. 1 and Fig. 2). Also in the housed periods the cell count showed transitory rises. The herd with the lowest average cell count (220,000/ml) was milked by an ordinary bucket milking system, while the herd with the highest average cell count (1,490,000/ml) was milked by a pipeline milking system. Five herds milked by machine had an average cell count of 720,000/ml and three herds milked by hand 540,000/ml. All the herds in the material had an average cell count of 680,000/ml.
在整个泌乳期，从8个不同畜群的30只山羊的乳腺半叶采集每周的牛奶样本，每个畜群有2至5只实验动物。通过投影显微镜研究了山羊奶在泌乳期间细胞计数的生理变化。在同一畜群的山羊奶样本中，平均细胞计数仅发现有小的变化，但不同畜群之间变化很大（表I和图3）。5个畜群的牛奶样本平均细胞计数曲线在放牧季节开始时呈上升趋势（图1和图2）。在圈养期间，细胞计数也出现短暂上升。平均细胞计数最低的畜群（220,000/毫升）采用普通桶式挤奶系统挤奶，而平均细胞计数最高的畜群（1,490,000/毫升）采用管道式挤奶系统挤奶。5个采用机器挤奶的畜群平均细胞计数为720,000/毫升，3个手工挤奶的畜群平均细胞计数为540,000/毫升。材料中的所有畜群平均细胞计数为680,000/毫升。
