Factors affecting the incidence and outcome of Trueperella pyogenes mastitis in cows.
Factors affecting the incidence and outcome of Trueperella pyogenes mastitis in cows.
复制标题
DOI：
10.1292/jvms.16-0401
复制
发表时间：
2017-03-23
期刊：
影响因子：
--
通讯作者：
Kawai K
中科院分区：
文献类型：
--
作者：
Ishiyama D;Mizomoto T;Ueda C;Takagi N;Shimizu N;Matsuura Y;Makuuchi Y;Watanabe A;Shinozuka Y;Kawai K
通过对2012年8月至2014年4月82头荷斯坦奶牛83个季度的化脓性特雷伯氏菌乳房炎诊断资料的调查和访谈，探讨了影响化脓性特雷伯氏菌乳房炎转归的主要因素。最终，一头奶牛在检查期间被出售，81头奶牛的82个季度被用于预后分析。化脓性毛滴虫乳房炎常年发生在哺乳期和干奶期奶牛身上。产脓性毛滴虫乳房炎的发病率没有明显的月份差异，也没有表现出季节性，无论是哺乳期奶牛还是干奶期奶牛。因此，化脓性毛滴虫乳房炎的发生也不同于夏季乳房炎。感染奶牛1个月存活率为64.6%(53/82)，化脓性毛滴虫乳房炎恢复率为14.6%(12/82)。以感染奶牛的存活率和扑杀数为目标变量，化脓性毛滴虫乳房炎的恢复期和未恢复期为客观变量，进行二元Logistic回归分析。与轻度病例相比，重度病例显著减少(优势比，16.30)，季度状态没有恢复(优势比，6.50)。结果表明，发病时症状的轻中度严重程度是影响感染化脓性毛滴虫乳房炎奶牛预后和康复的主要因素。此外，高水平的NAGase活性也表明可能将其用作扑杀患有化脓性毛滴虫乳房炎的奶牛的指标。
The main factors affecting the outcome of Trueperella pyogenes (T. pyogenes) mastitis were examined through a survey of diagnostic data and interviews relating to the occurrence of T. pyogenes mastitis in 83 quarters from 82 Holstein cows between August 2012 and April 2014. Ultimately, one cow was sold during the examination, and 82 quarters from 81 cows were used for analysis on prognosis. T. pyogenes mastitis occurred year round in both lactating and dry cows. The incidence of T. pyogenes mastitis did not significantly differ by month or show seasonality in either lactating or dry cows. Therefore, the occurrence of T. pyogenes mastitis also differed from that of summer mastitis. The 1-month survival rate of infected cows was 64.6% (53/82), and the recovery rate of quarters with T. pyogenes mastitis was 14.6% (12/82). Bivariate logistic regression analysis was performed with survival and culling of infected cows as objective variables and with recovery and non-recovery of quarters with T. pyogenes mastitis as objective variables. The severe cases were significantly culled (odds ratio, 16.30) compared to mild cases, and the status of quarters didn’t recover (odds ratio, 6.50). The results suggest that mild to moderate symptom severity at the time of onset are the main factors affecting outcomes in cows and recovery of quarters infected with T. pyogenes mastitis. Further, high level of NAGase activity also suggested the potential use as an indicator of culling of cows with T. pyogenes mastitis.