Differentiation of Alcaligenes faecalis from Brucella bronchisepticus by biochemical and nutritional methods.

BruceUa bronchisepticus has been variously claified and at present is usually included either in the genus Brucella or the genus Hemophilus. Szturm and Bourdon (1948) have pointed out their inability to differentiate this organism from Alcaligewe faecalis, and we experienced the same difficulty in our laboratories. Reference to Bergey's Manual of Determinative Bacteriology, edition 6, offered no criterion by which these two groups could be differentiated. Therefore, an attempt was made to determine whether these organisms were alike or could be separated by their nutritional or biochemical characteristics.