interpretable results when bacterial
colonies were recovered from Drigalski or
MacConkey agar, regardless of
carbapenemase production. Such results
might be a consequence of the
accumulation of lactic acid in the bacterial
isolates that were able to ferment lactose.
Therefore, the Carba NP test is not suitable
to identify carbapenemase producers
grown on Drigalski agar and MacConkey
agar plates.