. Dr. Evans' How to keep well; . of the spine (Potts disease), or of the muscles (psoas abscess), or the peritoneum (peri-tonitis)— all near-by structures — seldomspreads directly to the kidneys. Aroundeach kidney is a tense, almost impene-trable capsule which shields it from the in-fections of its neighbors. Infection can travel to the kidney bythe blood stream and up the ureters fromthe bladder. The most frequently infect-ing organism is the colon bacillus, the or-ganism which, so long as it stays in thelarge intestine, is nearly harmless. An-other one frequently found is the proteus,a germ
. Dr. Evans' How to keep well; . of the spine (Potts disease), or of the muscles (psoas abscess), or the peritoneum (peri-tonitis)— all near-by structures — seldomspreads directly to the kidneys. Aroundeach kidney is a tense, almost impene-trable capsule which shields it from the in-fections of its neighbors. Infection can travel to the kidney bythe blood stream and up the ureters fromthe bladder. The most frequently infect-ing organism is the colon bacillus, the or-ganism which, so long as it stays in thelarge intestine, is nearly harmless. An-other one frequently found is the proteus,a germ which of itself is quite harmlessbut which ferments the urine and manu-factures a lot of ammonia which irritatesand harms the kidney. Another important group is theordinary pus cocci, which may havetraveled to the kidney in the blood,but which usually have traveled from thebladder, in cases of cystitis, up to the kidney. Another of some importance isthe tubercle bacillus. The Phipps Institute found Brights disease frequently. Fig. 217. A Human Kidney a LittleMore Than One Half NaturalSize in an Adult. CHRONIC BRIGHTS DISEASE 621 present in the later stages of consumption, but that is a different matter frominfection of the kidney with tubercle bacilli. Tuberculosis of the kidney isusually unassociated with consumption. Gonococcus infection rarely travels to the kidney. Sometimes it does, butin most infections of the kidney, following a gonococcal infection elsewhere,complicating bacteria are responsible. Whether or not a person is to get an infection of his kidney dependslargely on himself, and that is the reason for this article. A large groupof the cases is due to the use of dirty catheters and other dirty instruments—not dirty in the sense that a garbage can is dirty, but laden with enoughbacterial life to infect the bladder or the urine in the bladder, whence theinfection travels to the kidney. Especially are men with enlarged prostatesliable to forget at timesthe nec
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