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. 

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



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" Tile li;i( iciits li\"i- out of di^ors.'' 



The C(:a\s arc also iii>]»'ct(M:l to 

 see if tlicy June 1 ulici'i-iilosis, for 

 such cows might spread the dis- 

 ease to human Ix'inpis. 



Dnririn; tlie summer months 

 many l)al)ies die from cholera 

 infantum. This disease is al- 

 most entirely spread throuRh 

 impure milk. Flies are largely 

 responsihle 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 160° for 20 

 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. 



