Tuberculosis in Cattle. 15 



other abdominal digestive organs. The lymph glands on the 

 posterior aspect of the liver are especially" liable to suffer. 

 With liver-tuberculosis there may be jaundice accompanied by 

 other symptoms of digestive trouble, but as in the affection of the 

 spleen and pancreas there is oftentimes only an indefinite ill health. 



Tuberculosis of the kidneys may be attended by extra tenderness 

 of the loins to pinching and by frequent passage of urine, which 

 may be discolored b}" blood or pus. The urine is likely to con- 

 tain microscopic cylindroid casts and when stained these may 

 show tubercle bacilli. 



Tuberculosis of the tedder is usuall}" manifested by a circumscribed 

 or general swelling of one or more quarters, without at first 

 special tenderness, and this gradually extends to the whole 

 gland. The milk may be watery, grumous, or even blood}" and 

 the lymph glands in front of the udder and behind are enlarged 

 and hardened. The tuberculous nature of the lesions can only 

 be certainl}^ determined by the discovery of the tubercle bacillus 

 in the milk, by the successful inoculation of the milk on a small 

 animal, or by the tuberculin test. 



Tjiberculosis of the throat and pharyngeal lymph glands is one of 

 the most common forms of tuberculosis in cattle. It causes a 

 wheezing breathing, glairy discharge from the nose or mouth, 

 difficulty in swallowing and a loose gurgling cough. The 

 diseased glands may be felt as soft swellings around the throat, 

 or as shrunken hard nodular bodies, or as masses fluctuating by 

 reason of their liquid contents. When the disease extends to 

 the interior of the lar3'nx it causes a persistent, paroxysmal, 

 husky cough. 



The lyinph gla?ids inside the lower jaiv or those 7iear the root of 

 the ear may swell up. soften and discharge a chees}" or thick 

 cream}' fluid containing the bacillus. 



The lymph glands inside the chest — bronchial mediastinal, etc., — 

 are especially liable to suffer, as they receive the infected lymph 

 which comes from the diseased lungs. These often suffer when 

 no lung disease can be found, the bacilli having passed through 

 the lung without forming any primary lesion in that organ, or 

 those that have been formed having healed. These are often 

 attended by no distinctive symptoms, and require the tuberculin 

 test. 



