Most MIC values for penicillin, ampicillin, amoxicillin and piperacillin (with or without a β-lactamasebenzlpenicillin (MIC ≤0.06 mg/L; susceptible by oxacillin disc screen) can be reported susceptible to β-lactamStreptococcus pneumoniae is most reliably. detected with an oxacillin 1 µg disc;...