Mattila T, Syväjärvi J, Jensen N E, Sandholm M
J Dairy Res. 1986 May;53(2):197-202. doi: 10.1017/s0022029900024791.
Bacterial growth was measured by a turbidimetric microtechnique in the whey of milk samples from quarters of cows with subclinical mastitis. Samples were grouped according to bacterial isolates recovered and the effects of bacterial species and whey on bacterial growth rates were analysed. Different strains of bacteria and different whey samples gave highly significant differences in bacterial replication rates. Except for penicillin-resistant Staphylococcus aureus, bacteria grew better in whey from mastitic milk where the inflammation was caused by the same bacterial species than in other mastitic milk samples. Inflammation caused by major pathogens generally enhanced the growth in whey of any type of major pathogen. Since mastitis pathogens showed enhanced growth in whey prepared from the same milk from which they were isolated, specific antibacterial factors in the whey did not appear to restrict bacterial growth in whey. The nutritional quality of the medium seems to be the important determinant of bacterial growth.
采用比浊微量技术测定患有亚临床型乳腺炎奶牛乳房各象限乳样乳清中的细菌生长情况。根据分离出的细菌菌株对样本进行分组，并分析细菌种类和乳清对细菌生长速率的影响。不同的细菌菌株和不同的乳清样本在细菌复制速率上存在极显著差异。除耐青霉素金黄色葡萄球菌外，由相同细菌种类引起炎症的患乳腺炎乳样中的乳清，比其他患乳腺炎乳样中的乳清更有利于细菌生长。主要病原体引起的炎症通常会促进任何类型主要病原体在乳清中的生长。由于乳腺炎病原体在从其分离出的同一乳汁制备的乳清中生长增强，乳清中的特定抗菌因子似乎并未限制细菌在乳清中的生长。培养基的营养质量似乎是细菌生长的重要决定因素。
