Cephalosporinase testing agent
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United States of America Patent
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Sep 27, 1994
Grant Date -
N/A
app pub date -
Feb 2, 1993
filing date -
Dec 21, 1990
priority date (Note) -
Expired
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Abstract
A cephalosporinase testing agent comprising a cephalosporin antibiotic, a penicillinase inhibitor in an amount of 20% by weight or less based on the weight of the cephalosporin-antibiotic, and a pH indicator which may be bromcresol purple is provided. A cephalosporinase producing bacteria can be judged by smearing a sample containing bacteria to be tested on the testing agent and observing the color tone change. According to this agent, cephalosporinase-active penicillinase producing bacteria are judged cephalosporinase-negative owing to the action of the penicillinase inhibitor, which may be clavulanic acid. Therefore, since only cephalosporinase producing bacteria are judged cephalosporinase-positive, this agent enables error free judgment.
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