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  • Title: [Comparative studies on activities of antimicrobial agents against causative organisms isolated from patients with urinary tract infections (1994). I. Susceptibility distribution].
    Author: Kumamoto Y, Hirose T, Yokoo A, Hikichi Y, Shigeta S, Shiraiwa Y, Kameoka H, Yoshida H, Tazaki H, Iri H, Uchida H, Kobayashi Y, Matsuda S, Fujime M, Fujita K, Kitagawa R, Igari J, Oguri T, Kosakai N, Yamaguchi K, Kashitani F, Yonezu S, Yamanaka Y, Takaha M, Iori F.
    Journal: Jpn J Antibiot; 1996 May; 49(5):465-93. PubMed ID: 8752862.
    Abstract:
    The frequencies of isolation and susceptibilities to antimicrobial agents were investigated on 567 bacterial strains isolated from patients with urinary tract infections in 10 hospitals during the period of June 1994 to May 1995. Of the above total bacterial isolates, Gram-positive bacteria accounted for 26.8% and a majority of them were Enterococcus faecalis. Gram-negative bacteria accounted for 73.2% and most of them were Escherichia coli. 1. Enterococcus faecalis. Ampicillin (ABPC) and imipenem (IPM) showed the highest activities against E. faecalis isolated from patients with urinary tract infections. The MIC90s of them were 1 microgram/ml. Vancomycin (VCM) was also active with the MIC90 of 2 micrograms/ml. Piperacillin (PIPC) and biapenem (BIPM) were also active with the MIC90s of 4 micrograms/ml and 8 micrograms/ml, respectively. The others were not so active with the MIC90s of 16 micrograms/ml or above. 2. Staphylococcus aureus including MRSA. VCM showed the highest activities against S. aureus isolated from patients with urinary tract infections. Its MIC90 was 1 microgram/ml against both S. aureus and MRSA. Arbekacin (ABK) was also active with the MIC90 of 2 micrograms/ml. The others except minocycline (MINO) were not so active with the MIC90s of 64 micrograms/ml or above. 3. Staphylococcus epidermidis. MINO showed the strongest activity against S. epidermidis isolated from patients with urinary tract infections. Its MIC90 was 0.25 microgram/ml. ABK was also active with the MIC90 of 1 microgram/ml. Cephems were active with the MIC90s of 2 approximately 16 micrograms/ml, but penicillins and quinolones were not so active with the MIC90s and 64 approximately 128 micrograms/ml. 4. Citrobacter freundii. Gentamicin (GM) showed the highest activities against C. freundii isolated from patients with urinary tract infections. Its MIC90 was 1 microgram/ml. IPM was also active with the MIC90 of 2 micrograms/ml. Cefpirome (CPR) and cefozopran (CZOP) were also active with the MIC90s of 4 micrograms/ml and 8 micrograms/ml. The others were not so active with the MIC90s of 32 micrograms/ml or above. 5. Enterobacter cloacae. IPM showed the highest activities against E. cloacae. Its MIC90 was 0.5 microgram/ml. GM and amikacin (AMK), ciprofloxacin (CPFX) and tosulfloxacin (TFLX) were also active with the MIC90s of 4 micrograms/ml. Penicillins and cephems except latamoxef (LMOX), cefmenoxime (CMX), CPR and CZOP showed lower activities with the MIC90s of 256 micrograms/ml or above. 6. Escherichia coli. Most of antimicrobial agents were active against E. coli. CPR, CZOP, IPM, carumonam (CRMN), CPFX and TFLX showed the highest activities against E. coli. The MIC90s of them were 0.125 microgram/ml or below. Cefotiam (CTM), flomoxef (FMOX) CMX, ceftazidime (CAZ), and LMOX were also active with the MIC90s of 0.25 microgram/ml. Penicillins were not so active with the MIC90s of 128 micrograms/ml or above. 7. Klebsiella pneumoniae. CRMN showed the highest activities against K. pneumoniae. Its MIC90 was < or = 0.125 microgram/ml. CZOP was also active with the MIC90 of 0.25 microgram/ml. Penicillins were not so active with the MIC90s of 128 micrograms/ml or above. 8. Proteus mirabilis. P. mirabilis was susceptible to a majority of drugs. CMX, CAZ, LMOX, CRP, cefpodoxime (CPDX), CRMN, CPFX and TFLX showed the highest activities against P. mirabilis isolated from patients with urinary tract infections. The MIC90s of them were 0.125 microgram/ml or below. MINO was not so active with the MIC90 of 128 micrograms/ml. 9. Pseudomonas aeruginosa. Most of the agents were not so active against P. aeruginosa. IPM showed MIC90 of 8 micrograms/ml. The others were not so active with the MIC90s of 16 micrograms/ml or above. CPFX showed MIC50 of 0.5 microgram/ml.
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