FURTHER OBSERVATIONS ON UTILIZATION OF THE SALTS OF ORGANIC ACIDS BY THE COLON-AEROGENES GROUP

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Abstract
In view of the distinction between Bacterium aerogenes and the intestinal Bact. coli which may be brought out by the use of citric acid, the utilization of a number of other related organic acids was tested. In addition to citric acid, tricarballylic, aconitic, glutaric and adipic acids were employed. Although several of these acids are structurally quite similar, none afforded the same distinction which may be brought out by citric acid. Bact. coli was unable to make use of any of the acids, with the possible exception of glutaric, and here the results were questionable. Some of the Bact. aerogenes and related soil types readily utilized tricarballylic and aconitic acids though others did not possess this property. Glutaric acid was utilized sparingly, if at all, while adipic acid gave negative results.

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