From: Anti-staphylococcal, anti-HIV and cytotoxicity studies of four South African medicinal plants and isolation of bioactive compounds from Cassine transvaalensis (Burtt. Davy) codd
Plant extract (mg/ml)
EC50(μg/ml)
CC50(μg/ml)
SI
C. gratissimus
9.6
100
10.4
C. transvaalensis
3.5
200
57.1
V. infausta
n.a
V. ferrugenea
130
Berberine
27