268 BACTERIA, YEASTS, AND MOLDS 



one, if thorough, is sufficient. But the chance of some 

 sHp in the appHcation makes it wise to use both methods, 

 at least in the case of serious contagious diseases. Dis- 

 infection should always follow smallpox, measles, diph- 

 theria, tuberculosis, and typhoid fever, and it is wise to 

 adopt it in cases of mumps, whooping cough, and the 

 other Ughter contagious diseases. 



