Figure 5.

Frequency of occurrence of the different stages (I–IV) granulomas within the head, neck (a), and thoracic lymph nodes (b) of vaccinated and control calves. The bars represent the percentage of granulomas within each developmental stage. A significant difference was observed in the frequencies of lesions in the head and neck lymph nodes of the vaccinated and control groups (panel a, p < 0.05), but not in the frequencies of the thoracic lymph nodes (b) between the vaccinated and control groups