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

Table 5

Patterns and indexes of multiple-antibiotic resistance (MAR) of Enterococcus faecium isolates (n = 65) 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	1 (4.2)	0	0	27 (65.9)	1 (1.5)	27 (41.5)	0.00
1	20 (83.3)	21 (87.5)	0	13 (31.7)	30 (30.8)	34 (52.3)	0.08
2	3 (12.5)	3 (12.5)	26 (63.4)	1 (2.4)	29 (44.6)	4 (6.2)	0.17
3	0	0	9 (22.0)	0	9 (13.9)	0	0.25
4	0	0	6 (14.6)	0	6 (9.2)	0	0.33
Total	24 (100)	24 (100)	41 (100)	41 (100)	65 (100)	65 (100)

All E. faecalis isolates (n = 10) were resistant to less than one agent.