The Synergy and Mode of Action of Cyperus rotundus L. Extract Plus Ampicillin against Ampicillin-Resistant Staphylococcus aureus

Table 4

FICI interpretation percentages.

FICI classes	Odds		EUCAST		Fratini et al.
	FICI values	Total (%)	FICI values	Total (%)	FICI values	Total (%)
, ,	≤0.5	13.85	≤0.5	13.85	<1.0	29.23
	-	-	>0.5–≤1.0	30.77	-	-
	-	-	-	-	=1.0	1.54
, ,	>0.5–≤4.0	86.15	>1.0–<2.0	55.38	>1.0–≤2.0	69.23
, ,	>4.0	0.00	≥2.0	0.00	>2.0	0.00

FICI interpretations as suggested by Odds, EUCAST, and Fratini et al.: , , : synergistic effect by Odds, EUCAST, and Fratini et al., respectively; : additive effect by EUCAST; : commutative effect by Fratini et al.; , , : indifferent effect by Odds, EUCAST, and Fratini et al., respectively; , , : antagonist effect by Odds, EUCAST, and Fratini et al., respectively.