Bokhout B A, Peterse D J, Koger P L, Terpstra W J
Afdeling Immunologie, Central Diergeneeskundig Instituut, Lelystad.
Tijdschr Diergeneeskd. 1989 Feb 1;114(3):123-30.
More than 5000 lactating cows from 82 farms, in the northern part of the Netherlands, were serologically examined for antibodies to Leptospira hardjo. Hardjo-positive cows were found on 52% of the farms with a mean incidence of 23% positive animals. Considerable differences were observed in the percentages hardjo-positive cows per region (7-30%), as well as in the percentages positive cows per positive farm (22-46%). With the exception of one region (14%) the percentages of hardjo-positive farms per region hardly differed (average 58%). In addition to the animal survey 488 sera of men working and/or living on cattle-farms were also examined. Twenty-six persons were hardjo-positive. Most of these persons (circa 90%) milked regularly. All seropositive persons were found on farms with hardjo-positive cattle. Results from an inquiry on circa 200 farms indicated, that hardjo-infections probably occur with a higher frequency on larger farms. Finally the results from this survey confirm the observation in the literature, that symptoms of hardjo-infections are more frequently found in the autumn.
对荷兰北部82个农场的5000多头泌乳奶牛进行了血清学检测，以检测其针对哈氏钩端螺旋体的抗体。在52%的农场中发现了哈氏钩端螺旋体阳性奶牛，阳性动物的平均发病率为23%。各地区哈氏钩端螺旋体阳性奶牛的百分比（7%-30%）以及每个阳性农场中阳性奶牛的百分比（22%-46%）存在显著差异。除了一个地区（14%）外，各地区哈氏钩端螺旋体阳性农场的百分比差异不大（平均58%）。除了对动物进行调查外，还对488名在奶牛场工作和/或生活的男性的血清进行了检测。有26人哈氏钩端螺旋体呈阳性。这些人中大多数（约90%）定期挤奶。所有血清阳性者均来自有哈氏钩端螺旋体阳性奶牛的农场。对约200个农场的调查结果表明，哈氏钩端螺旋体感染在较大农场中可能更频繁发生。最后，本次调查结果证实了文献中的观察结果，即哈氏钩端螺旋体感染症状在秋季更常见。
