Antimicrobial susceptibility testing was conducted on MuellereHinton
agar plates (Difco, BectoneDickinson, Sparks, MD) by
the agar disc-diffusion method according to CLSI criteria (2007)
[20]. The following antimicrobial agents were tested (mg/disc):
nalidixic acid (30), ciprofloxacin (5), amoxicillin (25); ticarcillin
(75); cephalothin (30); ceftazidime (30); streptomycin (10); sulphamethoxazole/trimethoprim
(25); tetracycline (30); gentamicin
(10) and colistin sulfate (50). For the antibiotics Amoxicillin and
colistin sulfate, which are not included in the CLSI list, the following
criteria were used: S 21/R < 14 and S 10/R < 10, respectively.
Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC
27853 were used as a control strains.
Antimicrobial susceptibility testing was conducted on MuellereHintonagar plates (Difco, BectoneDickinson, Sparks, MD) bythe agar disc-diffusion method according to CLSI criteria (2007)[20]. The following antimicrobial agents were tested (mg/disc):nalidixic acid (30), ciprofloxacin (5), amoxicillin (25); ticarcillin(75); cephalothin (30); ceftazidime (30); streptomycin (10); sulphamethoxazole/trimethoprim(25); tetracycline (30); gentamicin(10) and colistin sulfate (50). For the antibiotics Amoxicillin andcolistin sulfate, which are not included in the CLSI list, the followingcriteria were used: S 21/R < 14 and S 10/R < 10, respectively.Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC27853 were used as a control strains.
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