Antimicrobial Resistance of Fecal-Indicator Bacteria Isolated from Aquatic Animal Farms along the Korean Coast

Table 2

Antimicrobial resistance of Escherichia coli isolates (n = 289) collected from water samples and aquatic animals from aquaculture farms along the Korean coast in 2018.

Antimicrobials	Number (%) of isolates
	Susceptible	Intermediate	Resistant
Aminoglycosides
Gentamicin (GEN)	249 (86.2)	0 (0)	40 (13.8)
Streptomycin (STR)	222 (76.8)	0 (0)	67 (23.2)
β-lactam/β-lactamase inhibitor combinations
Amoxicillin/clavulanic acid (AMC)	235 (81.3)	4 (1.4)	50 (17.3)
Carbapenems
Meropenem (MEM)	254 (87.9)	29 (10.0)	6 (2.1)
Cephems
Cefepime (FEP)	246 (85.1)	1 (0.4)	42 (14.5)
Cefoxitin (FOX)	222 (76.8)	14 (4.9)	53 (18.3)
Ceftazidime (CAZ)	224 (84.4)	4 (1.4)	41 (14.2)
Folate pathway inhibitors
Trimethoprim-sulphamethoxazole (SXT)	230 (79.6)	0 (0)	59 (20.4)
Sulfisoxazole (FIS)	246 (85.1)	0 (0)	43 (14.9)
Penicillins
Ampicillin (AMP)	237 (82.0)	6 (2.1)	46 (15.9)
Phenicols
Chloramphenicol (CHL)	209 (72.3)	17 (5.9)	63 (21.8)
Polymyxin
Colistin (CL)	225 (77.9)	0 (0)	64 (22.1)
Quinolones
Ciprofloxacin (CIP)	261 (90.3)	11 (3.8)	17 (5.9)
Nalidixic acid (NA)	271 (93.8)	0 (0)	18 (6.2)
Tetracyclines
Tetracyclin (TET)	213 (73.7)	2 (0.7)	74 (25.6)