Van den Heever L W, Kowalski Z E, Olivier M
Department of Veterinary Public Health, Faculty of Veterinary Science University of Pretoria, Onderstepoort, Republic of South Africa.
J S Afr Vet Assoc. 1990 Jun;61(2):50-4.
The free fatty acid (FFA) content of milk from the paired normal (N) and septic (Staphylococcus aureus or S. agalactiae) subclinically mastitic (SSM) quarters of dairy cows was determined by thin layer chromatography. Within-cow comparisons showed the FFA content of milk from the SSM quarters to be consistently significantly higher than that of the opposing N quarters: initially and after warm agitation and both rapid and slow cooling prior to storage at 4 degrees C for 48 h. No correlation existed between initial and post-treatment FFA levels in milk from N quarters, but a significant positive correlation in the case of SSM milks suggests their greater susceptibility to both spontaneous and induced lipolysis. There was no correlation between the somatic cell content and FFA levels of either freshly-drawn or processed SSM milk. The study emphasises the importance of healthy udders in the production of milk of acceptable flavour and aroma.
采用薄层色谱法测定了奶牛成对的正常（N）和患亚临床型乳房炎（SSM）（金黄色葡萄球菌或无乳链球菌感染）乳腺的乳中游离脂肪酸（FFA）含量。奶牛个体内比较显示，SSM乳腺的乳中FFA含量始终显著高于相对的N乳腺的乳：在4℃储存48小时之前，初始状态、温热搅拌后以及快速和缓慢冷却后均是如此。N乳腺的乳中初始和处理后的FFA水平之间不存在相关性，但SSM乳的情况存在显著正相关，这表明它们对自发和诱导性脂解更敏感。新挤出的或经过处理的SSM乳的体细胞含量与FFA水平之间没有相关性。该研究强调了健康乳房对于生产具有可接受风味和香气的牛奶的重要性。
