White M E, Glickman L T, Barnes-Pallesen F D, Pearson E G, Montgomery M E, Armstrong D, Wickenden R P, Hickey G
Cornell Vet. 1986 Oct;76(4):335-41.
We used discriminant analysis to assess the indicants most useful in predicting whether a cow had coliform bacterial mastitis. One hundred and twenty-nine mastitic cows were divided into two groups, namely those with milk cultures that yielded pure or mixed gram negative organisms, and cows with other organisms or negative culture. Of 21 indicants examined by discriminate analysis only a history of previous mastitis in the affected quarter, weakness, clear or white color of milk, swelling of the udder, water consistency of the milk, lack of previous mastitis in other quarters, lack of palpable udder abscesses, and elevated body temperature were significantly associated with coliform mastitis. Using these variables 78% of cases were correctly classified.
我们采用判别分析来评估对预测奶牛是否患有大肠杆菌性乳腺炎最有用的指标。129头患乳腺炎的奶牛被分为两组，一组是乳汁培养产生纯革兰氏阴性菌或混合革兰氏阴性菌的奶牛，另一组是感染其他微生物或培养结果为阴性的奶牛。通过判别分析检测的21项指标中，只有患侧乳腺既往有乳腺炎病史、虚弱、乳汁清亮或呈白色、乳房肿胀、乳汁呈水样、其他乳腺无既往乳腺炎病史、未触及乳房脓肿以及体温升高与大肠杆菌性乳腺炎显著相关。利用这些变量，78%的病例被正确分类。
