Abstract：
This study examined the effects of low frequency milking on the concentrations of antimicrobial components in goat milk. Sixteen goats were divided into two groups of eight each: milking once every 2 d three times (for six days, three times group) or five times (for 10 days, five times group). On other days, milking was performed once daily. Milk was collected, and milk yield, somatic cell count (SCC), and the concentrations of some antimicrobial proteins such as lactoferrin (LF), S100A7, IgA, and sodium ions (Na+) in milk were measured. Milk yield significantly decreased in both the groups during the low-milking frequency period, followed by an increase above the low frequency milking period in both groups. In contrast, SCC and LF concentrations in milk increased in both groups during the low frequency milking period. The concentration of S100A7 in milk temporarily decreased after the low frequency milking period, followed by a significant increase. The S100A7 concentration during this period was higher in the five times group than in the three times group. These results indicated that low frequency milking induced a gradual decrease in milk yield and a concomitant increase in antimicrobial components, such as LF and S100A7, in milk. This increase in the antimicrobial components may be useful in preventing mastitis.
摘要：
本研究研究了低频挤奶对羊奶中抗菌成分浓度的影响。将16只山羊分为两组，每组8只：每2d挤奶一次3次（连续6天，三次组)或五次(持续10天，五次组)。在其他日子,每天进行一次挤奶。收集牛奶，和牛奶产量，体细胞计数（SCC），和一些抗菌蛋白如乳铁蛋白（LF）的浓度，S100A7,IgA,测定牛奶中的钠离子(Na+)。在低挤奶频率期间，两组的产奶量均显着下降，其次是增加以上的低频挤奶周期在两组。相比之下,在低频挤奶期间，两组牛奶中的SCC和LF浓度均增加。低频挤奶期后，牛奶中S100A7的浓度暂时下降，其次是显著增加。在此期间的S100A7浓度在5倍组中高于在3倍组中。这些结果表明，低频挤奶导致产奶量逐渐降低，抗菌成分随之增加。例如LF和S100A7，在牛奶中。抗微生物组分的这种增加可用于预防乳腺炎。
