Antanaitis Ramūnas, Juozaitienė Vida, Jonike Vesta, Baumgartner Walter, Paulauskas Algimantas
Large Animal Clinic, Veterinary Academy, Lithuanian University of Health Sciences, Tilžės str 18, LT-47181 Kaunas, Lithuania.
Department of Biology, Faculty of Natural Sciences, Vytautas Magnus University, K. Donelaičio 58, LT-44248 Kaunas, Lithuania.
Animals (Basel). 2021 Jun 10;11(6):1736. doi: 10.3390/ani11061736.
Bovine subclinical mastitis can cause great harm to dairy herds because of its negative impact on milk production and quality and cow health. Improved diagnostic tools are needed to maximise the control of subclinical mastitis distribution and ensure the high quality of milk as an industrial product. Between 2015 and 2020, seventy-two dairy herds were screened for bovine subclinical mastitis causative agents to identify the relationship between seasons, lactose levels and subclinical mastitis infection. The predominant species found in the milk samples were mixed microbiota, coagulase-negative and . Yeasts were found exclusively in autumn, while spp. and were only found in summer and autumn. A negative correlation was detected between milk lactose and number of somatic cells in milk (-0.471; < 0.001). The lactose levels in milk were closely associated with the prevalence (%) of subclinical mastitis pathogens, such as (y = -1.8011x + 10.867, R = 0.9298), . (y = -3.5216x + 25.957, R = 0.8604) and other (y = -0.5956x + 7.6179, R = 0.6656). These findings suggest that milk lactose may be used as a biomarker of suspected udder inflammation in modern health prevention programmes for cows to reduce the prevalence of subclinical mastitis pathogens in dairy cattle herds.
牛亚临床型乳腺炎会对奶牛群造成极大危害，因为它会对牛奶产量和质量以及奶牛健康产生负面影响。需要改进诊断工具，以最大限度地控制亚临床型乳腺炎的传播，并确保作为工业产品的牛奶的高质量。在2015年至2020年期间，对72个奶牛群进行了牛亚临床型乳腺炎病原体筛查，以确定季节、乳糖水平与亚临床型乳腺炎感染之间的关系。在牛奶样本中发现的主要菌种是混合微生物群、凝固酶阴性菌和……酵母菌仅在秋季被发现，而……菌和……菌仅在夏季和秋季被发现。牛奶乳糖与牛奶中的体细胞数量之间存在负相关（-0.471；P<0.001）。牛奶中的乳糖水平与亚临床型乳腺炎病原体的患病率（%）密切相关，例如……（y = -1.8011x + 10.867，R = 0.9298）、……（y = -3.5216x + 25.957，R = 0.8604）和其他……（y = -0.5956x + 7.6179，R = 0.6656）。这些发现表明，在现代奶牛健康预防计划中，牛奶乳糖可作为疑似乳房炎症的生物标志物，以降低奶牛群中亚临床型乳腺炎病原体的患病率。
