Fig. 5

Clinical index (mean ± SD) of P. ovis infested calves treated with carvacrol and Tween-80, before infestation (Week 0), 6 weeks after infestation, prior to treatment (W6 = D0) and throughout the post-treatment period. Clinical index is based on the lesion-involved skin areas (0, healthy skin; 1, lesions surface < 10% of body surface; 2, lesions surface 10–20% of body surface; 3, lesions surface 20–30% of body surface; 4, lesions surface > 30% of body surface)