TUBERCULOSIS IN THE DOG. 245 



other secretions maj' disseminate contagion. Thus in animals with 

 pulmonary tuberculosis the fasces are more or less charged with bacilli 

 derived from the muco-pus ejected from the bronchi into the pharynx, 

 and afterwards swallowed. 



Several cases have been recorded showing that dogs with lesions of 

 the kidneys or of the prostate also spread the virus by means of the 

 urine. I published the first in 1897. It was that of a dog with 

 generalised tuberculosis. The kidneys were crammed with tubercles 

 which had almost entirely destroyed the cortical layer. The prostate 

 was ten times its normal size, and its right lobe contained a cavernous 

 space. On compressing the gland, after having incised the urethra, 

 greyish pus, rich in bacilli, was seen to escape from its excretory ducts. 

 Large numbers of bacilli were also present in the urine contained in 

 the bladder. These renal and prostatic lesions were relatively old. 

 For several months, therefore, the animal had been spreading tuber- 

 culous virus by means of the urine. 



In one of our next lectures I shall speak of external forms of 

 tuberculosis in the dog and cat, and shall show that these animals may 

 become the subjects of tuberculous ulcers of the skin, hitherto mistaken 

 for harmless lesions. 



