CEPHALOSPORINASE TESTING AGENT.

摘要

A cephalosporinase testing agent comprising a cephalosporin antibiotic such as cephaloridin, a penicillinase inhibitor in an amount of 20 wt% or less based on the antibiotic, and a pH indicator such as bromocresol purple. A cephalosporinase producing bacterium can be judged by smearing a sample containing a test bacterium on the testing agent and observing the color tone change. According to this agent, a cephalosporinase-active penicillinase producing bacterium is judged cephalosporinase-negative by the action of a penicillinase inhibitor such as clavulanic acid. Therefore only a cephalosporinase producing bacterium is judged cephalosporinase-positive. Thus this agent is useful since it is free from misjudgment.