Ellis W A, O'Brien J J, Neill S D, Hanna J
Vet Rec. 1982 Feb 20;110(8):178-80. doi: 10.1136/vr.110.8.178.
The antibody titres of 149 cows aborting leptospire infected fetuses and 156 cows aborting fetuses not apparently infected with leptospires were determined by the microscopic agglutination (MA) test. There were differences in the distribution patterns of MA titres between the two groups of cows but these differences would only be of very limited value in the diagnosis of leptospiral abortion. Although 81.2 per cent of aborting cows which had a titre of 1:1000 or greater had leptospire infected fetuses, they represented 46.3 per cent of cows aborting leptospire infected fetuses. Among cows which aborted infected fetuses, 22.8 per cent had no detectable antibodies. The complement fixation and plate agglutination tests were of less value than the MA test.
通过显微镜凝集试验（MA）检测了149头流产感染钩端螺旋体胎儿的奶牛和156头流产未明显感染钩端螺旋体胎儿的奶牛的抗体滴度。两组奶牛的MA滴度分布模式存在差异，但这些差异在钩端螺旋体流产诊断中的价值非常有限。虽然滴度为1:1000或更高的流产奶牛中有81.2%的胎儿感染了钩端螺旋体，但它们仅占流产感染钩端螺旋体胎儿奶牛的46.3%。在流产感染胎儿的奶牛中，22.8%没有可检测到的抗体。补体结合试验和平板凝集试验的价值低于MA试验。
