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Table 3 Virucidal effect and virus yield reduction

From: In vitro antiviral activity of fifteen plant extracts against avian infectious bronchitis virus

No. Plant extract Concentrations of plant extracts equivalent to CC50 PFU number (mean ± SD), log10 PFU reduction rate, % TCID50 (mean ± SD), log10
1. S. montana 1 0 100 0
0.5 0 100 0
0.25 0.97 ± 0.19 78.0 0.75 ± 0.64 a
0.125 1.03 ± 0.11 76.6 1.83 ± 0.31 c x
5. O. vulgare 1 0 100 0
0.5 0 100 0
0.25 1.08 ± 0.00 75.4 1.00 ± 0.94 a
0.125 1.40 ± 0.32 68.2 2.48 ± 0.23 d x
6. M. piperita 1 0 100 0
0.5 0 100 0
0.25 0 100 0a
0.125 1.48 ± 0.05 x 66.4 2.63 ± 0.13 d x
8. M. officinalis 1 0 100 0
0.5 0 100 0
0.25 0.15 ± 0.21 96.6 0.56 ± 0.44 a
0.125 1.72 ± 0.01 x 60.9 3.38 ± 0.21 e x
11. T. vulgaris 1 0 100 0
0.5 0 100 0
0.25 0 100 0
0.125 1.70 ± 0.01 x 61.3 3.25 ± 0.22 ex
12. H. officinalis 1 0 100 0
0.5 0 100 0
0.25 1.33 ± 0.01 69.8 3.00 ± 0.29 b
0.125 2.00 ± 0.03 x 54.5 3.35 ± 0.29 e
15. S. officinalis 1 0 100 0
0.5 0 100 0
0.25 2.00 ± 0.00 54.5 3.25 ± 0.25 b
0.125 2.19 ± 0.03 x 50.2 3.45 ± 0.21 e
16. D. canadense 1 0 100 0
0.5 0 100 0
0.25 0 100 0a
0.125 1.70 ± 0.01 x 61.3 2.75 ± 0.16 d
  IBV (control) 4.40 ± 0.09 5.00 ± 0.19
  1. xmeans that the PHU number and TCID50 difference within the group (plant extract concentrations 0.25 and 0.125 CC50) was statistically significant (P < 0.05); if groups do not share a common letter a and b it means that the TCID50 (plant extract concentration 0.25 CC50) difference between the groups was statistically significant (P < 0.05); if groups do not share a common letter c, d and e it means that the TCID50 (plant extract concentration 0.125 CC50) difference between the groups was statistically significant (P < 0.05)