With the exception of animals 2757, post mortems were performed 16 weeks post infection.

Post mortem for 2757 was performed at week 6 post infection for reasons of animal welfare. The number of individual lung lobes and respiratory tract associated lymph nodes with TB lesions is presented. The pathology score is based on a semi-quantitative assignment of disease severity within affected tissues as described in the material and methods. Statistical difference between groups was determined using the Fisher Exact test (** p<0.01). Bacteriology score is based on the subtotal of a semi-quantitative ranking of total CFU for each individual tissue homogenate as described in the material and methods. Statistical difference between groups was determined using the Mann-Whitney test (** p<0.01).