Table 1.

Complement fixating activity of crude extracts from elderberry (EB) and elderflower (EF). DCM, dichloromethane; TFA, trifluoroacetic acid.

Test Compounds	IC50 (µg/mL) a
Crude extracts from elderberry
EB DCM	>200
EB 96% EtOH	7.8 ± 2.3
EB 50% EtOH	13.4 ± 2.9
EB 0.5% TFA in MeOH	12.3 ± 1.9
EB 50 °C water	44.9 ± 5.3
EB 100 °C water	23.3 ± 3.5
Pressed juice	142.4 ± 13.1
Crude extracts from elderflower
EF DCM	>200
EF 96% EtOH	6.5 ± 1.5
EF 50% EtOH	8.9 ± 2.2
EF 50 °C water	32.3 ± 5.2
EF 100 °C water	14.4 ± 3.1
BPII (positive control)	17.7 ± 1.5

^a IC₅₀: Concentration to give 50% inhibition of hemolysis.