718 



PATHOGENIC MICROORGANISMS 



litmus milk and in giving a powerful indol reaction. It produced 

 neither acid nor gas on maltose and dextrin. It differed from most 

 other indol producing organisms in that it produced this substance 

 in glucose broth in the presence of excessive glucose, and by dis- 

 tillation Morgan proved that it produced indol and not skatol- 

 carboxylic acid. Morgan's I bacillus is the only one of his bacilli 

 in which pathogenicity can be considered as a possibility. He does 

 not draw any definite conclusions in this regard. He is inclined, 

 however, to believe that the No. I bacillus may have pathogenic 

 properties. 



COMPOSITE TABLE OF MOST IMPORTANT TYPES 



= acid and gas. 

 + =acid, no gas. 



= negative. 



X = not needed for identification. 



Other organisms which he regards as possibly important he 

 speaks of as his Nos. Ill and IV types, both of which resembled 

 somewhat the Flexner type of dysentery. No. Ill he says agglu- 

 tinated, equally well with either Flexner or typhoid serum as if 

 closely related to both. It differed from the Flexner bacillus in 

 producing acid on sorbite. 



His No. IV differs from the Flexner in not producing indol. The 



