about 50 % of non-beta-lactamase producing bacteria ( 18 strains of different bacterial species ) produced an inducible beta-lactamase after ten daily subcultures with sub-inhibitory concentrations of each antibiotic , but minimum inhibitory concentrations ( mics ) of sbt/amp never increased after stimulation in contrast with other drugs whose mics were much higher in consequence of this procedure .
C0004611
bacteria
C0597979
beta-lactamase