TUBERCULOSIS IN THE DOG. 235 



thickened, showed rounded elevations at certain points, granulations 

 and tubercles at others. The mediastinum and its lymphatic glands 

 were enlarged. Opposite the division between the diaphragmatic and 

 cardiac lobes of the left lung was a small ulcerous wound due to the 

 opening of a cavernous space. The diaphragmatic lobe contained an 

 inflammatory centre as large as a nut, the central portion of which had 

 broken down and was full of greenish-grey pus ; around it the pul- 

 monary tissue was dotted with little purulent centres. The right lung 

 showed a few cicatricial patches, and its surface was adherent to the 

 parietal pleura at several points. Bacteriological examination revealed 

 numerous bacilli in the pus from the cavernous space. 



Our second patient was a three-year-old sheep-dog bought at the 

 age of six months by its present owner. It was allowed to run about 

 freely in a restaurant patronised chiefly by workmen and shop assistants, 

 and was in the habit of turning over the scraps of food from the plates 

 and the heaps of rubbish. Six weeks before, the animal lost its 

 appetite. From this time it became markedly thinner, and when 

 examined could scarcely stand upright. The face suggested extreme 

 depression ; the eye was retracted within the orbit ; the temporal and 

 all the usually prominent muscles were wasted ; the skin was dry and 

 adherent to the subjacent tissues. Respiration was rapid and painful, 

 and during expiration a portion of the air escaped from between the 

 lips. On auscultating the chest crepitant and mucous rales were noted 

 on either side. The percussion sound was partially dull. There was 

 no discharge from the nostrils. 



Suspecting tuberculosis, we insisted on the animal being left in 

 hospital for observation. 



The day afterwards we administered a dose of tuberculin ; the 

 temperature was 38*1° C. (ioo"5° F.) before injection, and five hours 

 afterwards rose to 39*3° C. (1027° F.). Tuberculin had therefore 

 produced fever to the extent of 1-2° C. (2*4° F.). Three days later the 

 animal was killed at the owner's request. 



On post-mortem examination we found the mesentery covered with 

 myriads of little tubercles between the sizes of a grain of millet and a 

 pea. The mesenteric glands were slightly enlarged. The liver was 

 increased in size and infiltrated with tubercles of all dimensions. 



In the thoracic cavity the pleura was covered with granulations 

 and tubercles. The mediastinum was greatly thickened, and appeared 

 bosselated in consequence of disease of the lymphatic glands. The 

 lungs contained numerous tubercles and some cavernous spaces filled 

 with fluid rich in bacilli. 



