Effect of low milking frequency on the concentration of antimicrobial proteins in goat milk

IF 1.4 3区 农林科学 Q4 IMMUNOLOGY
Rika Harada, Takahiro Nii, Naoki Suzuki, Naoki Isobe
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引用次数: 0

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.

低挤奶频率对羊奶中抗菌蛋白浓度的影响
本研究探讨了低频挤奶对羊奶中抗菌成分浓度的影响。16 只山羊被分成两组,每组 8 只:每 2 天挤奶一次,挤奶 3 次(6 天,3 次组)或 5 次(10 天,5 次组)。其他时间每天挤奶一次。收集牛奶,测量产奶量、体细胞数(SCC)和牛奶中一些抗菌蛋白的浓度,如乳铁蛋白(LF)、S100A7、IgA 和钠离子(Na+)。在低挤奶频率期,两组的产奶量均明显下降,而在低挤奶频率期之后,两组的产奶量均有所上升。相比之下,在低频挤奶期,两组牛奶中的SCC和LF浓度都有所上升。牛奶中的 S100A7 浓度在低频挤奶期后暂时下降,随后显著上升。在此期间,五次挤奶组的 S100A7 浓度高于三次挤奶组。这些结果表明,低频挤奶导致产奶量逐渐下降,牛奶中的抗菌成分(如 LF 和 S100A7)随之增加。这种抗菌成分的增加可能有助于预防乳腺炎。
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来源期刊
CiteScore
3.40
自引率
5.60%
发文量
79
审稿时长
70 days
期刊介绍: The journal reports basic, comparative and clinical immunology as they pertain to the animal species designated here: livestock, poultry, and fish species that are major food animals and companion animals such as cats, dogs, horses and camels, and wildlife species that act as reservoirs for food, companion or human infectious diseases, or as models for human disease. Rodent models of infectious diseases that are of importance in the animal species indicated above,when the disease requires a level of containment that is not readily available for larger animal experimentation (ABSL3), will be considered. Papers on rabbits, lizards, guinea pigs, badgers, armadillos, elephants, antelope, and buffalo will be reviewed if the research advances our fundamental understanding of immunology, or if they act as a reservoir of infectious disease for the primary animal species designated above, or for humans. Manuscripts employing other species will be reviewed if justified as fitting into the categories above. The following topics are appropriate: biology of cells and mechanisms of the immune system, immunochemistry, immunodeficiencies, immunodiagnosis, immunogenetics, immunopathology, immunology of infectious disease and tumors, immunoprophylaxis including vaccine development and delivery, immunological aspects of pregnancy including passive immunity, autoimmuity, neuroimmunology, and transplanatation immunology. Manuscripts that describe new genes and development of tools such as monoclonal antibodies are also of interest when part of a larger biological study. Studies employing extracts or constituents (plant extracts, feed additives or microbiome) must be sufficiently defined to be reproduced in other laboratories and also provide evidence for possible mechanisms and not simply show an effect on the immune system.
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