488 



PATHOGENIC MICROORGANISMS 



bacilli from diseased human beings and determine for each case whether 

 the guilty organism belonged to the human or bovine type. These 

 types can be differentiated definitely by cultural characteristics and 

 pathogenicity, and it is not likely that the type changes during the 

 sojourn in the human body. Granted this permanence of type, it is 

 naturally of much value in revealing the source of an infection, to de" 



COMBINED TABULATION, CASES REPORTED AND OWN SERIES OP CASES 

 (From Park and Krumwiede, loc. cit.) 



Mixed or double infections, 4 



termine whether or not a human being is harboring a bacillus of the 

 human type or one of the bovine type. 



One of the most valuable contributions made to this problem during 

 the last three years is that of Park and Krumwiede. 1 The above 

 tabulation is taken from their paper and represents a summary of their 

 own cases and those reported by others. 



1 Park and Krumwiede, Jour, of Med. Res., Oct., 1910. 



