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Table 3 Effects (mean percentage ± SE) of different concentrations of essential oils on inhibition of larval development of H. contortus

From: Essential oils of Citrus aurantifolia, Anthemis nobile and Lavandula officinalis: in vitro anthelmintic activities against Haemonchus contortus

Concentration (mg/ml) C. aurantifolia A. nobilis L. officinalis
3.0 100.0 ± 0.0a,b 95.3 ± 1.84a,b
1.5 100.0 ± 0.0a,b 100.0 ± 0.0a,b 89.8 ± 0.88b
0.75 100.0 ± 0.0a,b 97.2 ± 2.26a,b 81.4 ± 1.83b
0.375 90.1 ± 1.68b 86.4 ± 2.34b 64.2 ± 1.79b
0.187 85.4 ± 2.62b 67.1 ± 3.26b 35.9 ± 0.98b
0.0937 71.5 ± 1.35b 46.9 ± 1.18b 11.5 ± 0.95
0.0468 61.8 ± 1.16b 31.3 ± 2.81b 12.0 ± 2.83
0.0234 41.2 ± 0.81b 27.4 ± 1.61b 9.9 ± 2.02
0.0117 14.7 ± 1.81b 20.5 ± 1.28b 8.8 ± 1.44
0.0058 10.8 ± 0.35 12.4 ± 1.17 6.3 ± 0.64
0.0029 9.1 ± 0.59
  IC50 = 0.044 mg/ml IC50 = 0.117 mg/ml IC50 = 0.280 mg/ml
  R2 = 0.983 R2 = 0.989 R2 = 0.994
Levamisol (20 mg/ml) 99.8 ± 0.21b 99.8 ± 0.21b 99.8 ± 0.21b
DMSO (1%) 9.3 ± 2.16 7.8 ± 0.72 7.5 ± 3.17
  1. Abbreviations:C50, inhibitory concentration 50%; R2, nonlinear correlation
  2. aNo statistically significant difference between positive control and treatments
  3. bSignificant difference between positive control or treatments with negative control (ANOVA, followed by Tukey test; P < 0.05)