McDonald T J, McDonald J S
Am J Vet Res. 1976 Apr;37(4):377-81.
Streptococcal isolates from 71 dairy herds considered free of Streptococcus agalactiae were compared with isolates from 1 herd used in bovine mastitis research over a 12-year period. The incidence of streptococci was as follows: Streptococcus uberis, 56.5%; enterococci, 24.2%; Streptococcus dysgalactiae, 9.0%; Streptococcus bovis, 5.1%; unclassified streptococci, 3.1%; Streptococcus agalactiae, 1.5%; and Lancefield group G streptococci, 0.7%. The incidence for these streptococci in the 2 groups was generally the same except for Str bovis and unclassified streptococci. A study of cultural responses in numerous mediums indicated that differentiation of streptococci recovered from the bovine udder may be obtained with esculin broth, CAMP test, sodium hippurate broth, 0.1% methylene blue milk, inulin, and raffinose broths.
在12年的时间里，对来自71个被认为无无乳链球菌的奶牛场的链球菌分离株与来自1个用于牛乳腺炎研究的奶牛场的分离株进行了比较。链球菌的发生率如下：乳房链球菌，56.5%；肠球菌，24.2%；停乳链球菌，9.0%；牛链球菌，5.1%；未分类链球菌，3.1%；无乳链球菌，1.5%；以及兰斯菲尔德G组链球菌，0.7%。除牛链球菌和未分类链球菌外，这两组中这些链球菌的发生率总体相同。对多种培养基中培养反应的研究表明，使用七叶苷肉汤、CAMP试验、马尿酸钠肉汤、0.1%亚甲蓝牛奶、菊粉和棉子糖肉汤可以对从牛乳房中分离出的链球菌进行鉴别。
