CONTAGIOUS DISEASES 109 



the back. The eyes become sunken, and if 

 renal tuberculosis is present, amaurotic, or less 

 frequently there is an iritis or choroiditis, and 

 sometimes detachment of the retina. 



There is a persistent cough and sometimes 

 mucus is coughed up and ex^pelled, but is usu- 

 ally swallowed and so escapes notice. 



There may be intermittent diarrhea unless 

 the enlarged mesenteric glands cause partial 

 obstruction of the intestines, in which case there 

 is constipation. ^ The animal loses strength very 

 rapidly, is incapable of any exertion, exhibiting 

 panting and marked distress if made to move 

 quickly. 



If the liver is affected or the tubercular mes- 

 senteric glands or masses of deposit in the ab- 

 dominal cavity cause portal obstruction, ab- 

 dominal ascites occurs. This often takes the. 

 form of chylous ascites, the transuded fluid be- 

 ing milky and containing much fat. It should 

 be noted, however, that chylous ascites is not 

 pathognomonic of tuberculosis as it may occur 

 from anything that causes portal obstruction. 



The appfetite is variable and is usually sus- 

 pended towards the end, the temperature is 

 fluctuating, rising to 105° F. and falling again 

 to normal. If the lungs and pleura are attack- 

 ed the ordinary symptoms of pleuro-pneu- 

 monia are present and can be f ecognized by 

 ordinary diagnostic methods. The parotid 



