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  • Title: [Comparative studies on activities of antimicrobial agents against causative organisms isolated from patients with urinary tract infections (1996). II. Background of patients].
    Author: Kumamoto Y, Tsukamoto T, Hirose T, Yokoo A, Shigeta S, Takahashi T, Shiraiwa Y, Ogiwara M, Yoshida H, Imafuku Y, Murai M, Watanabe K, Uchida H, Kobayashi Y, Matsuda S, Fujime M, Fujita K, Igari J, Oguri T, Yamaguchi K, Matsumoto T, Kashitani F, Kaku M, Ooe H, Mochida C.
    Journal: Jpn J Antibiot; 1998 Feb; 51(2):112-29. PubMed ID: 9575438.
    Abstract:
    Clinical background was investigated on patients with urinary tract infections (UTIs) from whom 752 bacterial strains were isolated in 10 hospitals during the period from June, 1996 through May, 1997. 1. Distribution of age and sex of patients and type of infections. Among males, those with ages 40 years or older were more frequent, the higher the ages of them. Among females, those with ages in the 60's were the most frequent (24.6%), and those with ages in the 20's, 40's and 50's were about 13%. With regard to type of infections, more than a half of infections among males with ages 30 years or older were of complicated types, but most of infections among females were of uncomplicated types, especially among females of ages less than 60 years. 2. Ages of patients and types of pathogens. The higher the ages of patients, the lesser became the isolation frequencies of Escherichia coli, but the higher were those of Pseudomonas aeruginosa and Klebsiella spp. 3. Effect of antibiotic use on isolation frequencies of pathogens. Use of antibiotics decreased pathogens isolated from patients with uncomplicated UTIs drastically (231 isolates before antibiotics compared to 60 after). Even isolated pathogens from patients with complicated UTIs decreased drastically with the use of antibiotics when indwelling catheters were not in use (193 isolates before antibiotics compared to 75 after), but when indwelling catheters were in use, antibiotics apparently failed to decrease the isolation frequency. 4. Surgical procedures and types of causative organisms for UTIs. From cases of uncomplicated UTIs, E. coli was the most frequently isolated, followed by Enterococcus Faecalis and Klebsiella spp. E. coli was the most frequently isolated organism from complicated UTIs without indwelling catheters. When a surgical procedures were not done, E. coli was isolated most frequently. From cases of complicated UTIs with indwelling catheters, P. aeruginosa, E. coli and E. faecalis were the organisms that were mainly isolated, with isolation frequencies of 23.2%, 15.2, 12.2, respectively. When no surgical procedures were used, isolation frequencies of P. aeruginosa, E. faecalis and Enterobacter spp. were 17.2%, 13.8%, 13.8%, respectively.
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