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

Table 3

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

Number of antibiotics	Number (%) of isolates resistant to antibiotic agents						MAR index
	Water		Animals		Total
	Intermediate	Resistant	Intermediate	Resistant	Intermediate	Resistant
0	124 (75.1)	94 (57.0)	95 (76.6)	88 (71.0)	219 (75.8)	182 (63.0)	0.00
1	28 (17.0)	2 (1.2)	25 (20.2)	4 (3.2)	53 (18.3)	6 (2.1)	0.07
2	12 (7.3)	7 (4.3)	4 (3.2)	7 (5.7)	16 (5.5)	14 (4.8)	0.13
3	1 (0.6)	11 (6.7)	0	4 (3.2)	1 (0.4)	15 (5.2)	0.20
4	0	11 (6.7)	0	0	0	11 (3.8)	0.27
5	0	4 (2.4)	0	1 (0.8)	0	5 (1.7)	0.33
6	0	1 (0.6)	0	1 (0.8)	0	2 (0.7)	0.40
7	0	15 (9.1)	0	0	0	15 (5.2)	0.47
8	0	4 (2.4)	0	0	0	4 (1.4)	0.53
9	0	1 (0.6)	0	1 (0.8)	0	2 (0.7)	0.60
10	0	4 (2.4)	0	2 (1.6)	0	6 (2.1)	0.67
11	0	6 (3.6)	0	10 (8.1)	0	16 (5.5)	0.73
12	0	5 (3.0)	0	6 (4.8)	0	11 (3.8)	0.80
Total	165 (100)	165 (100)	124 (100)	124 (100)	289 (100)	289 (100)