Tuberculous lesion scores in Mycobacterium bovis challenged calves. Dot plot representing lesion score distribution in head, thorax, lung, abdomen and total (sum of all areas) for each animal. Horizontal lines show the median values. Significant differences were found in the thorax (p < 0.001) and lung (p < 0.05). EC: endotracheally challenged, OC: orally challenged.