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Table 4 Cell viabilities from MTT assay in combined treatments with virus compared to virus control group

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

Treatment Extract type Cell viability
(mean ± SD)
Co-pen Pre-pen Post-pen
Pittosporum viridiflorum, 2 Cold water 0.59 ± 0.11** 0.70 ± 0.18** 0.65 ± 0.15**
Pittosporum viridiflorum, 3 Acetone 0.85 ± 0.17** 0.85 ± 0.23** 0.84 ± 0.18**
Pittosporum viridiflorum, 4 30% ethanol 0.57 ± 0.06** 0.79 ± 0.11** 0.70 ± 0.16**
Pittosporum viridiflorum, 5 100% ethanol 0.54 ± 0.07** 0.56 ± 0.10** 0.48 ± 0.07**
Pittosporum viridiflorum, 6 Methanol 0.49 ± 0.07** 0.76 ± 0.10** 0.74 ± 0.16**
Cussonia spicata, 9 Acetone 0.79 ± 0.11** 0.90 ± 0.09** 0.76 ± 0.10**
Cussonia spicata, 11 100% ethanol 0.59 ± 0.05** 0.81 ± 0.16** 0.57 ± 0.10**
Cussonia spicata, 12 Methanol 0.53 ± 0.04** 0.55 ± 0.21** 0.56 ± 0.14**
Rapanea melanophloeos, 13 Methanol 0.75 ± 0.23** 0.83 ± 0.16** 0.80 ± 0.23**
Tabernaemontana ventricosa, 14 Methanol 0.60 ± 0.12** 0.63 ± 0.21** 0.67 ± 0.17**
Clerodendrum glabrum, 15 Methanol 0.71 ± 0.25** 0.80 ± 0.20** 0.78 ± 0.25**
Amantadine hydrochloride 0.79 ± 0.13** 0.75 ± 0.09** 0.71 ± 0.14**
Oseltamivir carboxylate 0.83 ± 0.16** 0.83 ± 0.18** 0.69 ± 0.14**
Influenza virus 0.20 ± 0.05 0.20 ± 0.05 0.20 ± 0.05
  1. Data presented as mean ± SD are averages of 4 independent MTT assays. **: highly significantly different from values obtained for drugs-treated samples compared to untreated sample (P ≤ 0.01) analyzed by SPSS, LSD post-hoc test