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Table 2 CC50, EC50 and SI of the extracts

From: South African medicinal plant extracts active against influenza A virus

Plant name and numbera Extract type CC50 (μg/ml)
(mean ± SD)
EC50 (μg/ml) SI
Pittosporum viridiflorum, 2 Cold water 129 ± 12.6 32.2 4
Pittosporum viridiflorum, 3 Acetone 165 ± 25.2 82.3 2
Pittosporum viridiflorum, 4 30% ethanol 77 ± 24.8 19.2 4
Pittosporum viridiflorum, 5 100% ethanol 7 ± 5.8 3.4 2
Pittosporum viridiflorum, 6 Methanol 15 ± 9.3 3.6 4
Cussonia spicata, 9 Acetone 108 ± 2.4 13.5 8
Cussonia spicata, 11 100% ethanol 39 ± 12.6 4.8 8
Cussonia spicata, 12 Methanol 117 ± 11.5 14.6 8
Rapanea melanophloeos, 13 Methanol 227 ± 13.6 113.3 2
Tabernaemontana ventricosa, 14 Methanol 0.1 ± 0.07 0.05 2
Clerodendrum glabrum, 15 Methanol 221 ± 34.9 110.4 2
  1. CC 50 50% cytotoxic concentration, EC 50 50% effective concentration, SI Selectivity Index
  2. aNumber refers to the plants numbering throughout the manuscript
  3. 2: Cold water extract of Pittosporum viridiflorum; 3: Acetone extracts of Pittosporum viridiflorum; 4: 30% ethanolic extract of Pittosporum viridiflorum;; 5: 100% ethanolic extract of Pittosporum viridiflorum; 6: Methanolic extract of Pittosporum viridiflorum; 9: Acetone extract of Cussonia spicata; 11: 100% ethanolic extract of Cussonia spicata; 12: Methanolic extract of Cussonia spicata; 13: Methanolic extract of Rapanea melanophloeos; 14: Methanolic extract of Tabernaemontana ventricosa; 15: Methanolic extract of Clerodendrum glabrum.