THni\>ersits of Cbtcago 



FOUNDED BV JOHN D. ROCKEFELLER 



THE MECHANISM OF NATURAL AND 



ACQUIRED STREPTOCOCCUS 



IMMUNITY 



A DISSERTATION 



SUBMITTED TO THE FACULTY OF THE OGDEN GRADUATE SCHOOL OF 



SCIENCE IN CANDIDACY FOR THE DEGREE OF 



DOCTOR OF PHILOSOPHY 



(DEPARTMENT OF PATHOLOGY AND BACTERIOLOGY) 



BY 



GUSTAV F. RUEDIGER 

 h 



' 



CHICAGO 

 1907 



