a case-control study comparing patients with gentamicin-susceptible ( mic less than 64 micrograms/ml ) and -resistant s. faecalis infections showed significant associations ( p less than .01 ) between the development of infection with highly gentamicin-resistant s. faecalis and prior antimicrobial therapy ( particularly with cephalosporins or aminoglycosides ) , perioperative antibiotic prophylaxis , prior surgical procedures , and longer hospitalization .
C1136254
antimicrobial
C0002556
aminoglycosides