140 MASTITIS OF THE COW 



for use as a milch cow, according to our [Sweden] statu- 

 tory regulations. [No Federal law in this country compels 

 an owner to kill such an animal. Law prevents interstate 

 shipment. Most municipal laws prevent sale of milk from 

 such a cow in the municipality.] 



If the examination establishes no definite diagnosis or 

 does not dispel the suspicion of a chronic infection, one may 

 proceed as before stated on the history of the animal until 

 an examination, eight to fourteen days later, confirms the 

 diagnosis or completely removes all suspicion of the case. 



Such an examination must be undertaken at least once a 

 month in order to constitute an effective milk control. To 

 establish a certainty that none of the milch cows have udder- 

 tuberculosis these examinations must be repeated every 

 fourteen days. 



If the milk is to be used as food for calves or pigs one 

 should follow the same general principles. 



These animals may be fed the milk from cases of chronic 

 mastitis, if it is of normal appearance and providing it is 

 boiled before being used. 



Summary 



1. Milk as food for man. 



A. Bloody milk. 



B. Milk containing infectious organisms. 



1. Rules: 



a. Milk from an udder-infection is unfit for use 



by man. 

 h. Milk from the other quarters can be used 



when boiled. 



c. The diseased cow is isolated and milked last. 



d. The infected milk is disinfected. 



e. The rules are cancelled when the infection dis- 



appears. 



