FIFTIETH ANNUAL CONVENTION 139 



of the udder, where it can be assisted to a head and lanced 

 by the veterinarian, or it may be ruptured internally and 

 discharge its creamy, liquid pus through the teat. In the 

 event of both external and internal rupturing of an abscess 

 of the udder, there is danger of establishing a milk fistula. 

 Treatment — The abscess may be hastened to a head 

 by hot fomentations or poultices. It is then ready to be 

 opened and drained. The after-treatment usually consists 

 of simple cleanliness in the general care of the animal and 

 the dressing of the part twice daily with a watery solution 

 containing 5 per cent each of glycerin and phenol. 



Gangrene of the Udder. 



Gangrene is caused by a serious interference with the 

 blood circulation, as in some cases where the inflammatory 

 swelling or distension with milk is so great as to produce 

 intense pressure on the blood vessels of this region. The 

 resulting slow, necrotic process causes the death and slough- 

 ing off of the affected quarter or quarters. This condition 

 sometimes leads to fatal consequences, due to blood poison- 

 ing. 



Treatment — The raw surfaces should be thoroughly 

 and frequently sponged with some good antiseptic, such as 

 a one-half per cent solution of chloride of zinc. If amputa- 

 tion of the gangrenous area becomes necessary, it should 

 be undertaken only by one skilled in surgical procedure. 



Tuberculosis of the Udder. 



Usually tuberculosis infection of the udder may be 

 distinguished from other udder infections by its gradual 

 onset and chronic course, as well as the fact that it rarely 

 occasions the animal any pain or inconvenience. Tubercu- 

 losis of the udder usually commences well up in one or both 

 rear quarters, and may involve the lymph glands situated 

 above and back of the two rear quarters of the udder. The 

 organ itself becomes progressively hard and swollen, some- 

 times acquiring enormous siz,e. Milk secretion appears 

 normal until the infection has progressed considerably, 



