Recognize the setting in which infection develops with chromosomal Beta-lactamase producing bacteria.


Explanation:

Beta lactamase production is nowadays commonly encountered but more so in hospital settings than in the out-patient.

It is more common in patients already on a beta lactam antibiotic e.g. drug abuser who takes occasional antibiotics.

It should be treated - as everybody knows - with Vancomycin in case of Staph and Strept. but with those bacteria whose names end with bacter-e.g. Enterobacter or citrobacter -use the big guns like Imipenem or Meropenem.