RELATION OF BACTERIA TO DISEASE. 1Q1 



would find that certain varieties are capable of develop- 

 ing and thereby producing disease only on the mucous 

 membrane of the throat, others of the intestine, others 

 of the urethra ; some develop only in a wound or in 

 the blood, while others, again, under favorable condi- 

 tions, seem able to grow in or upon almost any region 

 of the body. 



