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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.