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Table. 4.

Table. 4.

Antibiotic resistance profile of Bifidobacterium breve BS2-PB3 based on the disk-diffusion method.

Antibiotic class Antibiotic Clear zone diameter (mm) R/S/I
Aminopenicillin Ampicillin (10 µg) a 49 ± 0.60 S
Bacitracin Bacitracin (10 IU) a 58 ± 2.31 S
Glycopeptide Vancomycin (30 µg)a 48 ± 2.65 S
Cephalosporine Cefoxitin (30 µg) a 26 ± 3.21 S
β-Lactams Oxacillin (1 µg)b 6 ± 0.00 R
Amphenicols Chloramphenicol (30 µg)a 63 ± 2.08 S
Macrolides Erythromycin (15 µg)a 62 ± 1.53 S
Streptomycin (10 µg)a 37 ± 2.52 S
Aminoglycosides Kanamycin (30 µg)a 20 ± 4.00 S
Tetracycline Tetracycline (30 µg)a 57 ± 2.65 S
Clindamycin (2 µg)b 56 ± 5.51 S
Lincosamides Lincomycin (2 µg)c 50 ± 3.61 S
Pleuromutilins Lefamulin (20 µg) e 75 ± 2.08 S
Monocarboxylic acid Mupirocin (200 µg)d 11 ± 1.15 R
Quinolones Ciprofloxacin (5 µg) a 32 ± 2.89 S
Rifampicin Rifampicin (5 µg)a 64 ± 1.15 S
Sulfonamide Sulfonamide (300 µg)a 7 ± 1.15 R

Diameter of clear zone/inhibition zone was presented as the mean of three experiments ± SD. aInhibition zone was based on [58]. bInhibition zones of oxacillin and clindamycin were based on CLSI standard described by [59]. cInhibition zone of lincomycin was based on [60]. dInhibition zone of mupirocin was based on [61]. eInhibition zone of lefamulin was based on interpretative criteria results of Staphylococcus aureus (methicillin-susceptible isolates) as described by [62]. R, Resistance; S: Sensitive; I, Intermediate.

J. Microbiol. Biotechnol. 2024;34:871~879 https://doi.org/10.4014/jmb.2311.11031
© J. Microbiol. Biotechnol.