CONTKOL OF BACTERIAL DISEASES 245 



BACTKKIAL TESTS or MILK PRODUCED IN KELTOX DAIRIES 

 (BACTERIA PKR CUBIC CENTIMETER) 



tuberculosis, typhoid, dysentery, diphtheria, tonsillitis, cholera, and the 

 vir is of scarlet fever. This does not make the milk any cleaner, nor does 

 it kill the more resistant bacteria, hut if it is dangerous, it renders 

 it safe. 



Flies, vermin, house pets as transmitters of contact in- 

 fections. After the human hand come other active germ 

 earners, and among these the house fly probably stands 

 first not only in transmitting germs of filth and disease to 

 foods but in combining air-carriage with contact. This prob- 

 lem has been treated in a previous chapter. Roaches and rats 

 and mice . should be universally recognized as too filthy to 

 eat with, and should be completely exterminated, along with 

 tin; flies, from every household. Cats, on account of their 

 oflen intimate contact with children, have been responsible 

 for innumerable infections, especially of diphtheria. Since 

 this germ attacks cats virulently, they assume the double role 

 of irresponsible patients and mechanical carriers in the family. 



1 This dairy, on April 3, had a count of 8,000,000. 



2 This count was made March 30. 



3 Due to Kelton dairymen raising dust by sweeping at milking time. 



