HEALTH AND DISEASE 



435 



The milk supply is also subject to rigid inspection. Milk brought 

 into a city is tested, not only for the amount of cream present to 

 prevent dilution with water, but also for the presence of germs. 

 The cleanliness of the cans, wagons, etc., is also subject to inspection. 





' The patients live out of doors." 



The cows are also inspected to 

 see if they have tuberculosis, for 

 such cows might spread the dis- 

 ease to human beings. 



During the summer months 

 many babies die from cholera 

 infant urn. This disease is al- 

 most entirely spread through 

 impure milk. Flies are largely 

 responsible for the spread of 

 the disease by carrying the 



germs to milk. Spread of such diseases through milk can only be 

 prevented by careful pasteurization (heating to 170 for a few 

 minutes). In many large cities pasteurized milk is sold at a 

 reasonable price to poor people, and thus much disease is pre- 

 vented. 

 Disease germs of various sorts, typhoid, tuberculosis, pneumonia, 



