SOD1 and infection: We demonstrated the feasibility of this specific approach by characterizing the surface proteome of a reference strain of M. avium 104. We also confirmed the important role of one of the surface associated proteins, Cu-Zn superoxide dismutase While its participation on macrophage infection was limited, its value to M. avium upon infection of neutrophils, what happens during the initial phase of the infection in vivo [15], was significant.