RESUMO
The aim of this study was to investigate antibacterial resistance among enterococci species isolated in Tehran Baghyatallah Hospital. It consisted of 126 isolates of E. faecalis [86%], E. faecium [9%] and other Enterococus Spp. [5%] isolated from urine [34.92%], blood [27.77%], wound swabs [19.84], stool [5%] endotracheal secretions [3.37%], abscess [3.4%], dialysis fluids [1.7%] and catheter [4%]. Twelve [9.5%] isolates were resistant to vancomycin. The VRE isolates were resistant to ampicillin [75%], erythromycin [50%], tetracycline [58%], ciprofloxacin [41.6%], chloramphenicol [33.3%] and gentamicin [41.6%]. Two [16.66%] of VRE isolates were multidrug resistant. Eight [66.6%] of the vancomycin-resistant strains and all of the MDR strains carried the vanA phenotype and genotype. The MIC of VRE isolates were between 32-512 micro g/ml. Our results show that most glycopeptide resistant E. faecalis and E. Faecium carried vanA. It is also possible that frequency of infections caused by glycopeptide-resistant enterococci will increase in our geographical area