Box plots of the coccidiosis lesion scores on d 21 (A, C, E) and d 22 (B, D, F). The data of the total mean lesion score (A, B), E. acervulina lesion score (C, D) and E. maxima lesion score (E, F) are presented and the strains (A, B, C) of the challenge group are illustrated in different colors (blue = A = Hungary field strains, green = B = Netherlands field strains, yellow = C = Poland field strains). The total mean lesion score (TLMS), E. acervulina lesion score and E. maxima lesion score is significantly higher in the challenge groups compared to the control group on both sampling days.