Figure 1

M. avium 2-151 smt establishes a persistent infection in C57BL/6 mice and is effectively delivered via aerosol. (a) Lung bacterial burden assessed by colony forming units (CFU) 24 h and 2, 4 and 6 weeks post intranasal infection with M. avium Chester or M. avium 2-151 smt in C57BL/6 mice, n = 3–7 mice per time point, data represents mean ± SD. (b) Lung bacterial burden assessed by CFU 24 h post infection by aerosol or intranasal infection, n = 4 mice per group.