Enterococci lead to many problems in terms of treatment failure and mortality
in patients especially due to antibacterial resistance. identification of antibiotic resistance in community is of
extreme importance to prevent failures particularly in the treatment of infections. therefore, this study
intended to screen antibiotic-resistant enterococci samples from patients.
Samples were collected from feces and blood of patients hospitalized over a period
of 9 months from july 2013 to march 2014 in vali-e asr and mousavi hospitals. diagnostic tests such as
growth in the presence of bile esculin agar and nacl 6.5% as well as catalase and gram staining were
performed to verify the samples. agar disk diffusion method for antibiotic susceptibility testing and
microtitre plate assay was performed to evaluate the mic of vancomycin.
Among the tested antibiotics, ciprofloxacin showed the highest and teicoplanin as well as
vancomycin exhibited the least antibiotic resistance. interestingly, vancomycin minimum inhibitory
concentration was determined 5 to 50 microgram/milliliter
In our study, isolated enterococci from the hospitalized patients showed relatively high
resistance to majority of antibiotics. meanwhile, antibiotic resistance to teicoplanin and vancomycin were
acceptable in comparison to other similar studies.