1908 Journal of the American Medical Association  
Being convinced of the importance of this strong sugar reaction of the saccharolytic group and its absence in case of the colon bacillus, an investigation was made to determine the actual explanation of the difference thus manifested. Two suppositions were considered : First, that B. coli communis may possess slower actions on the sugar; or second, that it produces some substance which inhibits the saccharolysis which would otherwise proceed as in the saccharolytic group. Both types of
more » ... h types of organisms begin to form gas at about the same time, but the colon bacillus produces gas more slowly than the group of allied species and its gas production ceases after from twenty-four to forty-eight hours. The saccharolytic group, on the contrary, after beginning about the same time as the colon bacillus to produce gas, continue more rapidly and do not cease until the sugar is entirely exhausted, the duration varying with the percentage of sugar in the medium. At the same time it was found
doi:10.1001/jama.1908.25310450005001b fatcat:y65pbqsrpfhuplfl3u5ba4gy24