60 DAIRYING 



761. Winslow* states that "When the temperature is be- 

 tween 103 and 103.8 the test is doubtful and the animal should 

 be re-tested after 3 months." 



"When the temperature rises gradually to 103.8 F., or over 

 within 15 hours after the injection, the animal may be considered* 

 positively affected with tuberculosis, provided this constitutes a 

 rise of 2 over the maximum temperature recorded before the 

 injection. " 



MILK FEVER. 



762. This disease is said to be more common in cows calving 

 in the spring than in the fall, and it is also claimed that milking 

 the udder dry in the first 24 hours after calving brings on milk 

 fever. 



The disease causes the cow to become very uneasy, and she 

 lays down with her head drawn to one side. 



Relief and cure of the disease is now obtained by forcing air 

 into the udder through the teats. This, it is claimed, has been suc- 

 cessfully done in an emergency by means of a bicycle pump, but 

 a small syringe designed for this purpose should be owned by 

 everyone who keeps cows at the present time. A complete and in 

 expensive outfit for giving this treatment to cows is now adver- 

 tised in nearly all the agricultural and dairy papers. 



ABORTION. 



763. The premature birth of the calf may be caused by an 

 accidental injury, or by bacteria, which are responsible for con-' 

 tagious abortion. The latter are spread by the bull and by germs 

 present in the air or dust of a cow stable. 



An aborting animal should be isolated at once, and all the 

 bedding burned, the floor disinfected with lime or some other 



*Production and Handling of Clean Milk, p. 348. 



