-transparent.png){kind=logo}
Cefoxitin is a new, cephalosporin-like antibiotic which is highly resistant to hydrolysis by beta-lactamase. Ninety-one cultures were selected either for their general resistance to cephalosporin antibiotics or for their ability to produce beta-lactamase. Some of these cultures were resistant to cefoxitin. The capacity of each of the 91 strains to hydrolyze cefoxitin with beta-lactamase was determined. Only seven of the cultures degraded the antibiotic as determined by a general assay for beta-lactamase. Several others were able to hydrolyze cefoxitin after enzyme was induced by low concentrations of the antibiotic. The role of the constitutive and inducible enzyme in bacterial resistance to the antibiotic was investigated. Enzymatic destruction of cefoxitin was found to be an important factor contributing to bacterial resistance. However, the complete and rapid degradation of cefoxitin is not essential to resistance since one strain, Enterobacter cloacae 1316, hydrolyzed the antibiotic very slowly but was able to grow unaffected in the presence of cefoxitin. The presence of the enzyme is not necessarily sufficient to confer resistance since another culture, Klebsiella D535, readily hydrolyzed the antibiotic but was susceptible to it.
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
January 1974,
Antimicrobial agents and chemotherapy,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
August 1974,
Antimicrobial agents and chemotherapy,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
January 1974,
Antimicrobial agents and chemotherapy,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
July 1978,
The New Zealand medical journal,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
August 1978,
Fortschritte der Medizin,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
January 1978,
Arzneimittel-Forschung,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
January 1979,
Die Medizinische Welt,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
April 1977,
Antimicrobial agents and chemotherapy,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
December 1985,
Antimicrobial agents and chemotherapy,
H R Onishi, and
D R Daoust, and
S B Zimmerman, and
D Hendlin, and
E O Stapley
November 1986,
Antimicrobial agents and chemotherapy,
