Table 2. Selectivity Indices “SI” for Tested Plant Extracts against Avian Influenza A/H5N1 Virus in MDCK Cells.

plant extract	CC50(mg/mL)	IC50(mg/mL)	SI (CC50/IC50)
C. fistula flower extract	>10	>1.0	NA
T. laxiflora leaf extract	>10	>1.0	NA
S. terebinthifolius extract (fruit)	>10	>10	NA
S. terebinthifolius extract (stem)	>10	>10	NA
radish seed extract	11.24	CC50 < IC50	<1
black mustard seed extract	16.9	CC50 < IC50	<1
cinchona bark extract	>10	CC50 < IC50	<1
T. cordata flower extract	19.22	CC50 < IC50	<1
santonica (A. cina) flower extract	>10	0.00342	>2924
black tea leaf extract	>10	>1.0	NA
coffee seed extract	7.96	0.084	94.76
E. camaldulensis leaf extract	>10	>1.0	NA
vinca herb extract	0.78	CC50 < IC50	<1
E. sativa juice containing glucosinolate hydrolysis products	>10	0.0562	>178
E. sativa juice containing intact glucosinolates	>10	0.0647	>155
E. sativa methanolic extract containing intact glucosinolates	5.07	0.451	11.24
E. sativa methanolic extract containing glucosinolate hydrolysis products	9.22	1.215	7.59
oseltamivir carboxylate	>10	0.000865	>11,561