. Fig. 56. Bacterium of Preisz. Bacterium in pus cells 1-12 obj. 4 ocular [Gilruth). from the affected glands. It is pathogenic for mice, guinea pigs and rabbits. The organism isolated by Gilruth seems to have been more virulent than the one isolated by Xorgaard and Mohler. § 169. Symptoms. In the majority of cases no symp- toms of any importance are observed in the affected animals during life. The course of the disease is that of a chronic affection and the pathological changes develop so slowly that no general or local interference with the health of the affected animals is observed in lamb
. Fig. 56. Bacterium of Preisz. Bacterium in pus cells 1-12 obj. 4 ocular [Gilruth). from the affected glands. It is pathogenic for mice, guinea pigs and rabbits. The organism isolated by Gilruth seems to have been more virulent than the one isolated by Xorgaard and Mohler. § 169. Symptoms. In the majority of cases no symp- toms of any importance are observed in the affected animals during life. The course of the disease is that of a chronic affection and the pathological changes develop so slowly that no general or local interference with the health of the affected animals is observed in lambs and sheep that are bred and raised for mutton and are marketed before they are two years old. Only in breeding ewes and wethers does the disease advance to a degree which makes it clinically recognizable without the aid of manipulation. The affected animals upon
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