CHEMOTHERAPY JUNE 1986
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1 VOL. 34 S-3 CHEMOTHERAPY Fig. 1 Structural formula of L-105
2 CHEMOTHERAPY JUNE 1986
3 VOL. 34 S-3 CHEMOTHERAPY Table 1 Antibacterial spectra of L-105 against gram negative anaerobic rods Inoculum 106 cells/ml
4 CHEMOTHERAPY JUNE 1986 Table 2 Antibacterial spectra of L-105 against gram negative anaerobic rods Inoculum 108 cells/ml Table 3 Antibacterial spectra of L-105 against gram positive anaerobic rods Inoculum 108 cells/ml
5 VOL. 34 S-3 CHEMOTHERAPY Table 4 Antibacterial spectra of L-105 against gram positive anaerobic rods Inoculum 106 cells/ml Table 5 Antibacterial spectra of L-105 against anaerobic cocci Inoculum 106 cells/ml Table 6 Antibacterial spectra of L-105 against anaerobic cocci Inoculum 108 cells/ml
6 CHEMOTHERAPY JUNE 1986 Table 7 Comparative in vitro activity of L-105 against clinical isolates
7 VOL. 34 S-3 CHEMOTHERAPY Table 7 (Continued) Inoculum: 105 cells/ml except in case of Black pigmented Bacteria and anaerobic cocci (105 cells/nil) * P. magnus (8 isolates), P. mic-ros (3 isolates), P. a.sacchaolvticus (2 isolates), P. prerotii (one isolate), P. anaerobius (one isolate) Fig. 2 Stability of L-105 to the,3-lactamases derived from three B. fragilis isolates Note; Rate of hydrolysis are relative to an arbitar value of 100 for cephaloridire
8 CHEMOTHERAPY Table 8 Comparison of MIC and MBC Table 9 Protective effect of L-105 and CMX to subcutaneous abscess formation due to B. fragilis GAI-0558 Table 10 The effect of L-105 on the microflora of cecum of mice Note; Mice; ICR male 19 }1g Drug administration; 10 mice were given 1 ~2mg L-105 s.c. at 24 hourly intervals for 7 days. 10 other mice were given 1 ~2mg cefotaxime s.c. Another 10 mice were controls. Caecal content; Caecal contents were collected from sacrificed mice on the 1st day on 7th days after the antibiotic was withdrawn and transported to the anaerobic chamber as soon as possible. Processing specimens; the specimens were suspended in anaerobic diluent and properly diluted. Each dilution was then inoculated onto modified CCMA plates.
9 CHEMOTHERAPY 2) PERRET, C.: Iodometric assay of penicillinase. Nature (London) 174: 1012 `4013, ) JOINER, K. A. et al.: A quantitative model for subcutaneous abscess formation in mice. Br. J. Exp. Path. 61: 97 `107, 1980
10 CHEMOTHERAPY IN VITRO AND IN VIVO ACTIVITY OF L-105 AGAINST ANAEROBIC BACTERIA KUNITOMO WATANABE, KAKUYO SAWA, MAKOTO AOKI, MASAYUKI MIYAUCHI, TOYOKO KOBAYASHI and KAZUE UENO Institute of Anaerobic Bacteriology, School of Medicine, Gifu University L-105, a newly developed semisynthetic cephem, was examined in vitro and in vivo of its activity against anaerobic bacteria, with analogous cefotaxime (CTX) and cefmenoxime (CMX) used as controls. The spectrum of the antibacterial activity of L-105 on anaerobic bacteria was similar to that of CTX and CMX covering a wide range, with the exception of a part of B. fragilis group and Clostridium difficile. The antibacterial activity of L-105 was strong, showing the MIC of 3.13ƒÊg/ml at inoculation of 108 CFU/ml, and 12.5 pg/ml at 108 CFU/ml on almost all the strains tested, except for the above mentioned bacteria. L-105 was far more stable than cefazolin and cefoperazone against beta-lactamase produced by B. fragilis, but showed somewhat hydrolysis which was similar to CTX and CMX. L-105 showed no inhibitory effect on pus formation caused by simultaneous inoculation of B. fragilis and autoclaved caecal contents.
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Clostridium difficile ciprofloxacin, ofloxacin, norfloxacin Bifidobacterium Lactobacillus Lactobacillus Bacteroides fragilis B. fragilis C. difficile
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日本化学療法学会雑誌第53巻第S-3号
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