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Table 3 Combination effect of SBD and OXA on SA

From: Antimicrobial and antibiofilm activities of Cu(II) Schiff base complexes against methicillin-susceptible and resistant Staphylococcus aureus

Compound

Concentration (μg/mL)

FIC index

Sum FIC index

Interaction

Static/cidal effect

SBD

OXA

SBD

OXA

SBD2

8

2

1.00

0.13

1.13

Additive

Bacteriostatic

4

2

0.50

0.13

0.63

Additive

Bacteriostatic

2

2

0.25

0.13

0.38

Synergy

Bacteriostatic

1

2

0.13

0.13

0.26

Synergy

Bacteriostatic

0.5

2

0.06

0.13

0.19

Synergy

Bacteriostatic

8

1

1.00

0.06

1.06

Additive

Bacteriostatic

SBD4

32

2

1.00

0.13

1.13

Additive

Bacteriostatic

16

2

0.50

0.13

0.63

Additive

Bacteriostatic

8

2

0.25

0.13

0.38

Synergy

Bacteriostatic

4

2

0.13

0.13

0.26

Synergy

Bacteriostatic

32

1

1.00

0.06

1.06

Additive

Bacteriostatic