during an outbreak of infection with ampicillin-resistant , tem-1 beta-lactamase-producing escherichia coli serotype o15 , some strains were noted to differ from the majority in that they showed reduced susceptibility to amoxycillin/clavulanic acid ( augmentin ) , ureidopenicillins and first generation cephalosporins and produced increased amounts of beta-lactamase .
C0054066
amoxycillin/clavulanic acid
C0591132
augmentin