STABIHTY OF CEFTEZOLE AGAINST VARIOUS β-LACTAMASES FROM GRAM-POSITIVE AND GRAM-NEGATIVE BACTERIA
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- NEHASHI TOSHIYUKI
- Department of Bacteriology, School of Medicine, Juntendo University Research Laboratories, Chugai Pharmaceutical Co., Ltd.
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- YAMAMOTO TATSUO
- Department of Bacteriology, School of Medicine, Juntendo University
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- YOKOTA TAKESHI
- Department of Bacteriology, School of Medicine, Juntendo University
Bibliographic Information
- Other Title
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- Ceftezoleの各種β-lactamaseに対する安定性
- Ceftezole ノ カクシュ ベータ Lactamase ニ タイスル ア
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Abstract
A newly devised cephalosporin-derivative, ceftezole (CTZ), was investigated for its stability to various β-lactamases.<BR>Though about 60% of clinically isolated, ampicillin resistant E. coil and Klebsiella spp. were found to produce penicillinase type β-lactamase mediated by conjugative R plasmids, CTZ was still highly effective against them because of its nonhydrolysable character by such types of β-lactamase.<BR>On the other hand, some strains of Ent. cloacae, Serratia marcescens and Pr. vulgaris were highly resistant not only to penicillins but also cephalosporin derivatives including CTZ. Ent. cloacae Nek-39, one of the resistant strains, was confirmed to produce both plasmid-mediated penicillinase type and chromosomally originated cephalosporinase type f3-lactamases, by means of Sephadex G-75, CM-cellulose and DEAE-cellulose column chromatography. CTZ was tolerant to the former g-lactamase but not to the latter one.<BR>CTZ was not hydrolysed also by penicillinase produced by penicillin G resistant Staph. aureus, and it showed marked antibacterial effect on that.<BR>It may be concluded that CTZ is one of the excellent chemotherapeutics for infectious diseases caused by ampicillin resistant E. coli and Klebsiella, and by penicillin G resistant Staphylococcus as well.
Journal
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- CHEMOTHERAPY
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CHEMOTHERAPY 24 (4), 635-644, 1976
Japanese Society of Chemotherapy
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Details 詳細情報について
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- CRID
- 1390282681258856448
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- NII Article ID
- 130004070979
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- NII Book ID
- AN00186653
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- ISSN
- 18845894
- 00093165
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- NDL BIB ID
- 1705188
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed