Agger J F, Priou C, Huda A, Aagaard K
Department of Animal Science and Animal Health, Royal Veterinary and Agricultural University, Frederiksberg, Denmark.
Vet Res. 1994;25(2-3):227-34.
A group of 152 Danish dairy herds infected with Streptococcus agalactiae during 1992 was compared with 177 randomly selected control herds in order to identify factors of importance for the transmission of this bacteria between herds. The diagnosis was based on a laboratory microbiological test on a bulk tank milk sample, and management information was collected by telephone interviews with the farmers. Results from logistic regression clearly indicate that purchase of cows or heifers increases the risk of a new Streptococcus agalactiae herd infection. Hygiene management risk factors inside the farm were also identified.
为了确定对无乳链球菌在牛群间传播具有重要意义的因素，将1992年感染无乳链球菌的152个丹麦奶牛群与177个随机选择的对照牛群进行了比较。诊断基于对大罐牛奶样本的实验室微生物检测，并通过与农民进行电话访谈收集管理信息。逻辑回归结果清楚地表明，购买母牛或小母牛会增加新的无乳链球菌牛群感染风险。还确定了农场内部的卫生管理风险因素。
