BACTERIA AND HEALTH 



387 



leave the host in special ways ; (2) that they are commonly 

 transferred to other hosts in special ways ; and (3) that they 

 then enter the bodies of the new hosts in special ways. 



TRANSMISSION OF COMMUNICABLE DISEASES 



429. Infection. The table above tells how the germs of 

 a number of common diseases are thrown off, how they are 

 carried about, and how they enter the bodies of the new hosts. 



