Table 2.

Antimicrobial susceptibility interpretation of the 53 isolated monophasic Salmonella Typhimurium strains.

Antibiotic agent	Breakpoint interpretive criteria (μg/ml)			Results in percentage (%)
	Sensitive	Intermediate resistance	Resistant	Sensitive	Intermediate resistance	Resistant
Chloramphenicol	≤8	16	≥32	47.17(25/53)	5.66 (3/53)	47.17 (25/53)
Trimethoprim-sulfamethoxazole	≤2/38	–	≥4/76	52.83(28/53)	0 (0/53)	47.17 (25/53)
Colistin	-	≤2	≥4	0 (0/53)	94.34 (50/53)	5.66 (3/53)
Ertapenem	≤0.5	1	≥2	100 (53/53)	0 (0/53)	0 (0/53)
Meropenem	≤1	2	≥4	100 (53/53)	0 (0/53)	0 (0/53)
Cefotaxime	≤1	2	≥4	66.04 (35/53)	0 (0/53)	33.96 (18/53)
Ceftazidime	≤4	8	≥16	79.25 (42/53)	13.21 (7/53)	7.55 (4/53)
Ceftazidime / avibactam	≤8/4	–	≥16/4	98.11 (52/53)	1.89 (1/53)	0 (0/53)
Tetracycline	≤4	8	≥16	5.66 (3/53)	0 (0/53)	94.34 (50/53)
Tigecycline	≤0.5	–	>0.5	100 (53/53)	0 (0/53)	0 (0/53)
Ciprofloxacin	≤0.06	0.12–0.5	≥1	28.30 (15/53)	54.72 (29/53)	16.98 (9/53)
Nalidixic acid	≤16	–	≥32	66.04 (35/53)	0 (0/53)	33.96 (18/53)
Azithromycin	≤16	–	≥32	92.45 (49/53)	0 (0/53)	7.55 (4/53)
Amikacin	≤16	–	≥32	98.11 (52/53)	0 (0/53)	1.89 (1/53)
Streptomycin	≤8	16	≥32	5.66 (3/53)	5.66 (3/53)	88.68 (47/53)
Ampicillin	≤8	16	≥32	5.66(3/53)	0 (0/53)	94.34 (50/53)
Ampicillin / sulbactam	≤8/4	16/8	≥32/16	11.32 (6/53)	24.53 (13/53)	64.15 (34/53)