導管を利用した尿路変向時の尿路感染にかんする考察

Abstract

Microorganisms isolated from the simple urinary infections were Gram negative rods in 80 % and Gram positive cocci in 20 %, 1965 to 1969. Of Gram negative rods, E. coli was constant, Proteus, and Klebsiella increased, and Pseudomonas has decreased during these years. From the patients having catheters inserted after urinary diversion, Gram negative rods were isolated in nearly 100 %. Enterobacter, Pseudomonas, Proteus and Klebsiella were frequent and E. coli was relatively infrequent in nephrostomy or ureterostomy. In cystostomy and urethrostomy, E. coli, Pseudomonas and Proteus were dominant. Operation on the urinary tract or indwelling catheter often caused change of bacterial flora which is called colonization. Superinfection or suprainfection was seen in case of indwelling catheter, probably being enhanced by presence of foreign body, urinary stasis, postoperative administration of antibiotic or compromised host. This condition might advance to opportunistic infection.