Enterobacter face cystic lesions culture susceptibility to cipro ok until 2 weeks later new lesion now bactrim told no more cipro but why not both?

One antibiotic is ok: Enterobacter Species of gram negative rods are usually resistant to most penicillins , sensitive to Cipro and sometimes to Bactrim. Many have an inducible Beta-lactamase that makes them resistant to even third generation Cephalosporins . The drug of choice for simple strains is usually Cipro or Bactrim. They may develop later resistance to Cipro if used frequently! Bactrim is also alternative.