Higgins R J, Harbourne J F, Little T W, Stevens A E
Vet Rec. 1980 Sep 27;107(13):307-10. doi: 10.1136/vr.107.13.307.
Following a sudden drop in milk yield in a large dairy herd, leptospiral mastitis due to serotype hardjo was diagnosed serologically and by isolation of the organism from the milk and urine of affected cows. Two milkers subsequently became ill and developed titres to the Hebdomadis serogroup. During the same period the neighbouring herd experienced poor milking performance and a series of abortions and serological evidence suggested recent hardjo infection. The common source of infection appeared to be infected down calving heifers.
在一个大型奶牛群中牛奶产量突然下降后，通过血清学检测以及从患病奶牛的乳汁和尿液中分离出病原体，确诊为血清型哈德乔引起的钩端螺旋体性乳腺炎。随后两名挤奶工生病，并对七日热血清群产生了抗体效价。同一时期，相邻牛群的产奶性能不佳，出现了一系列流产情况，血清学证据表明近期感染了哈德乔。感染的共同来源似乎是感染的产后小母牛。
