Table 2.

Profile of antibiotics susceptibility of B. velezensis FiA2

Drug class	Drug	µg/ml	Inhibition zone	Category
Macrolide	Erythromycin	15	22.23 ± 0.15	S
Beta-lactam	Ampicillin	10	22.20 ± 0.10	S
	Meropenem	10	17.43 ± 0.15	I
Aminoglycoside	Gentamicin	10	24.56 ± 0.25	S
	Kanamycin	30	24.06 ± 0.10	S
Tetracycline	Tetracycline	30	24.76 ± 0.35	S
	Doxycycline	30	27.16 ± 0.15	S
Quinolones	Ciprofloxacin Chloramphenicol Norfloxacin	5 30 10	32.46 ± 0.15 29.06 ± 0.05 18.26 ± 0.10	S S I
Fluoroquinolone	Enrofloxacin	10	33.50 ± 0.25	S
Glycopeptide	Vancomycin	30	24.26 ± 0.30	S
Rifamycin	Rifampicin	5	20.20 ± 0.25	I
Cephalosporin	Ceftazidime	30	24.33 ± 0.15	S
Others	Polymyxin B Trimethoprim	30 25	0 31.26 ± 0.20	R S

*For each antibiotic the inhibition zone (diameter in mm) was measured and expressed as susceptible, S (zone ≥ 21 mm); intermediate, I (zone = 16–20 mm); and resistance, R (zone < 15 mm)