440 PATHOGENIC MICROORGANISMS 



"Shiga" "I 



"Kruse," Ferment dextrose. Group I. 



"New Haven" 



" Y" (Hiss and Russell type) ~] 



"Seal Harbor" ., ^ 



> Ferment dextrose and mannit. Group II. 

 " Diamond " 



"Ferra" 



) Ferments dextrose, mannit, saccharose 

 Strong (type) j- Group ITL 



Harris " (type) "j Ferment dextrose, mannit, maltose, saccha- 



Gray ' 1 rose, dextrin. Fermentation of saccharose 



"Baltimore" ( as a ru i e ) only after 6 davg> G roup jy. 



"Wollstein" 



It was noticed, it should be mentioned, however, that in the case of the 

 " Y," "Diamond," and "Ferra" there was usually delayed acid fermen- 

 tation of maltose, never any of dextrin. 



In studying the agglutinative characters of these groups, furthermore, 

 it was found that fermentation tests and agglutinations went hand in 

 hand. The following table will illustrate this point : J 



SERUM OF RABBIT IMMUNIZED AGAINST GROUP I. (Shiga's culture). 



Bacilli of Group I.: 



" Shiga " (homologous) 20,000 



"Kruse" 20,000 



"New Haven" 20,000 



Bacilli of Group II.: 



" Y " , 200 



"Ferra " 200 



"Seal Harbor" 200 



Bacilli of Group IV.: 



"Baltimore" 800 



"Harris" 800 



"Gray" 800 



"Wollstein" 800 



SERUM OF RABBIT IMMUNIZED AGAINST GROUP II. ("Y" culture, 

 Hiss and Russell). 



Bacilli of Group I.: 



"Shiga" less than 100 



"Kruse" 100 



"New Haven" 100 



1 Hiss, Jour, of Med. Research, 13, N. S., viii, 1904. 



