The appearance of the colon bacillus in the urinary tract in health following gestation, disease or injury, and especially following surgical operation, is a problem of peculiar interest to the profession.
When the colon bacillus was first isolated from human feces by Emmerich in 1885 he thought it to be the specific cause of Asiatic cholera but, later, it was found to be a normal habitant of the feces. However, its presence in appreciable numbers in uncontaminated urine has usually been considered as associated with pathologic change, for the urinary tract is not considered the natural locality of the colon bacillus.
In searching the literature one is impressed with the variant conditions during or following which a colonbacilluria exists, aside from certain saprophytic strains occurring in apparently normal subjects. It is quite commonly intercurrent in the infectious diseases. Colon bacillus pyelitis frequently complicates the diseases of childhood. Such diversified conditions