Jaartsveld F H, Mathijssen H M
Tijdschr Diergeneeskd. 1976 Jun 15;101(12):664-8.
Performing the milk ring test in herd samples from herds of approximately twenty dairy cows is an acceptable method in checking herds for brucellosis. Herds of approximately forty dairy cows or more are unsuited for this method of checking. For the above reasons, it is essential that the compulsory examination of the blood of aborting cows should be consistently carried out and that the larger herds in the threatened areas should be examined by performing the milk ring test in individual samples at regular intervals.
对约20头奶牛的牛群样本进行乳环试验是检查牛群布氏杆菌病的一种可接受方法。约40头或更多奶牛的牛群不适合用这种检查方法。基于上述原因，必须持续对流产母牛的血液进行强制检查，且对受威胁地区的较大牛群应定期对个体样本进行乳环试验检查。
