34 



CLEAN MILK 



apt to contaminate their milk with the special germs to be found 

 in suppurating wounds. Cows suffering from fevers of any de- 

 scription yield milk which may either contain special germs caus- 

 ing these disorders, or the poisons produced by these germs. 



Cows with lockjaw (tetanus) or rabies may communicate 

 these diseases to man by means of the specific germs in their milk. 

 There appears to be some doubt as to whether these disorders have 

 ever been actually transmitted to persons through the milk of cows 

 sick of tetanus or rabies, but such milk should never be consumed by 

 man or animals. 



Milk sickness in man is due to a special bacillus (B. lactimorbi) 

 escaping in the milk of cows suffering from Trembles, (p. 78). 



The following drugs are known to escape in some amount in 

 milk when given to cows. Other medicines may be excreted in milk 

 also, as the subject has not been thoroughly studied. On general 

 principles no powerful drug should be given to cows supplying 

 market milk. Harmless drugs, as iron or simple bitters, would not 

 damage the milk. 



'It may be positively affirmed that the milk from a sick cow or 

 one receiving powerful drugs, is not fit for human consumption. 

 The milk of tuberculous cows may be safely fed to swine or calves 

 after boiling for ten or more minutes. 



