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M. W. LYON JR., M.D.
JAMA. 1917;LXIX(16):1342-1343. doi:10.1001/jama.1917.02590430036010.
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As little mention of the hemolytic properties of colon bacilli is made in the literature, the following report may not be without interest.

From a patient, an adult woman with some obscure bladder or kidney trouble, several samples of catheterized urine were collected in sterile bottles and submitted for bacteriologic examination with the suggestion that the case might be tuberculous. The urine when received was cloudy, but on standing or centrifuging rapidly settled out clear. Microscopically the sediment showed numerous pus cells, no casts, and large numbers of a doubtfully motile and gram-negative bacillus of general colon morphology. No acid-fast organisms were found in the urine.

Three guinea-pigs were inoculated in the groin with the centrifuged urine sediment as follows: Oct. 9, 1916, one was inoculated with the sediment of about 50 c.c. of urine, and died, November 6, showing at the site of inoculation a necrotic area and pocket


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