Figure 1.

Mean gross and microscopic tissue lesion scores in Vaccinates and Controls by region. Means presented are for descriptive purposes only. Tissues collected at necropsy from Vaccinates and Controls 12 weeks post-challenge with 10⁶ colony forming units (cfu) virulent M. bovis strain 06-4387. Vaccinates received two oral doses of approximately 10⁷ cfu inactivated M. bovis at 19 and 12 weeks prior to challenge.