440 PATHOGENIC MICROORGANISMS 



"Kruse," > .Ferment dextrose. Group I. 



"New Haven" 



" Y " (Hiss and Russell type) "] 



"Seal Harbor" 



,,_. , > Ferment dextrose and manmt. Group II. 



Diamond 



"Ferra" 



,, N ) Ferments dextrose, mannit, saccharose 



"Strong" (type) j Qroup m . 



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

 " Gray " ros6j d ex t r i n . Fermentation of saccharose 



'Baltimore " (as a rule) only after 6 dayg Qr Iy 



"Wollstein" J 



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: 1 ' 



SERUM OF RABBIT IMMUNIZED AGAINST Gnotjp 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 



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



