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To the Editor:—
Dr. Crance in his article entitled "The Necessity for Standardization of the Treatment of Bacilluria" (The Journal, January 26, p. 285) makes a definite advance by his recognition of the necessity of differentiating colon group bacilli into their two genera. This step is of such importance, especially in the evaluation of therapeusis, that it is greatly to be regretted that Dr. Crance has not given information in regard to the bacteriologic details necessary for this differentiation. This cannot be done on the basis used by Dr. Crance; i. e., the fermentation of sucrose. This test is employed for the differentiation of species of the genus Escherichia, of which our old friend B. coli-communior most familiarly represents the sucrose fermenting group and B. coli-communis the sucrose negative group (Zinsser, Hans, and Bayne-Jones, Stanhope: A Textbook of Bacteriology, 1934, p. 561). Only by use of the Voges-Proskauer and methyl
Hill JH. STANDARDIZATION IN TREATMENT OF BACILLURIA. JAMA. 1935;104(13):1186. doi:10.1001/jama.1935.02760130136020
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