Now, this happens in nearly all  er  cases o of tuberculosis  but, interesting, the vast majority  of infections microbacterium tuberculosis are asymptomatic  and the reason for that is that after a period of growth and dissemination does not lead to clinical symptoms, cell mediated immunity, C M I, comes into  comes into play  and you end up with a balance between the macrophages, and fi  and M T B, where there's a constant turnover of  macrophages  dying, and M T B  winning out.