Hathaway S C, Little T W, Stevens A E
Vet Rec. 1982 Jan 30;110(5):99-101. doi: 10.1136/vr.110.5.99.
A total of 3722 sera was obtained from 188 flocks widely distributed throughout England and Wales; three sera were randomly selected from each flock and tested in the microscopic agglutination test for leptospiral antibodies. Infection with leptospires of the Hebdomadis serogroup was found to the widespread and it is probable that the infecting serovar is hardjo. The prevalence of hardjo titres in the random survey was 6.4 per cent and within-herd prevalences ranged up to 94.4 per cent. Titres to autumnalis antigen were found in 7.3 per cent of sera and evidence is presented that suggests a proportion of these titres are cross-reactions with agglutinins stimulated by infection with leptospires from other serogroups. Titres to bratislava antigen (Australis serogroup) were found in 3.4 per cent of sera. Within-herd prevalences of autumnalis and bratislava titres did not range above 16.7 per cent and 26.3 per cent respectively.
从广泛分布于英格兰和威尔士的188个鸡群中总共采集了3722份血清样本；每个鸡群随机选取3份血清样本，进行显微镜凝集试验以检测钩端螺旋体抗体。发现七日热血清群钩端螺旋体感染广泛存在，感染血清型可能为哈氏焦群。在随机调查中，哈氏焦群抗体效价的流行率为6.4%，鸡群内流行率高达94.4%。7.3%的血清样本检测到秋季热抗原抗体效价，有证据表明其中一部分效价是与其他血清群钩端螺旋体感染刺激产生的凝集素发生的交叉反应。3.4%的血清样本检测到布拉迪斯拉发抗原（澳大利亚血清群）抗体效价。鸡群内秋季热和布拉迪斯拉发抗体效价的流行率分别不超过16.7%和26.3%。
