970 Vetermary Obstetrics 



or quarters. The danger of mammitis increases as the proximity 

 of the lesion to the teat orifice increases. Sometimes the lesion 

 occurs in the teat orifice itself, interfering promptly with the pas- 

 sage of milk and leading quickly, in many cases, to infection of 

 the gland. 



Apparently the mammitis is not the direct, but rather an indi- 

 rect result of the presence of the eruptions. The infection of the 

 gland takes place after the scabs have attained large size and 

 more or less abundant suppuration has occurred around their bor- 

 ders. It seems that the infection is attributable to the pus 

 which thus forms, and later gains access to the milk cistern 

 through the teat orifice. Our chief interest in the disease is the 

 prevention of the mammitis by thorough disinfection. Whether 

 this be genuine cow-pox or not, the disinfection should be careful 

 and ample. The diseased parts should be thoroughly disinfected 

 before and after milking, and the hands of the milkers should be 

 well disinfected before and after the milking of each cow, 

 whether diseased or sound. We recommend in this disease the 

 washing of the udder of the cow and the hands of the milkers 

 with a i-iooo corrosive sublimate solution, to be followed by 

 the application of a disinfectant to the teats and adjacent parts 

 of the udder, consisting of equal parts of tincture of iodine, tinct- 

 ure of arnica and glycerine. If the crusts become detached, leav- 

 ing a raw sore, this may be carefully touched with stick silver 

 nitrate, or with tincture of iodine. 



When the lesion is located directly in the milk orifice, vigor- 

 ous disinfection should be instituted. The part should be pen- 

 cilled with a fine cone of silver nitrate, or a drop of tincture of 

 iodine inserted by means of a medicine dropper. 



4. Tuberculosis of the Udder. Tubercular Mammitis. 



Tuberculosis of the udder is virtually confined to the cow. 

 Although tuberculosis is very common among dairy cows, recog- 

 nizable tubercular disease of the udder is comparatively rare. 

 When it does occur it is regarded as especially important because 

 of the highly infectious character of the milk. 



Symptoms. The symptoms of tuberculosis of the mammary 

 gland consist usually of a tense swelling of the mammae, gener- 

 ally of one quarter only, and most frequently one of the hind 

 quarters. The general condition of the animal is not affected by 



