Fig. 9

Mycobacterial infections lead to changes in the cellular sizes and light densities. a Comparisons of nuclear and cytoplasmic sizes between infected and non-infected cells. Mann–Whitney U-tests were performed, the ranks are given and meanings of p values labeled as asterisks (*** = p ≤ 0.001, ns = not significant). b Comparisons of cytoplasmic (top) and nuclear (bottom) light densities (LDs) between infected and non-infected cells. Based on the test assumptions Mann–Whitney U tests were chosen and the graphs were created by transformed data of 2 groups, as particularly infected and non-infected cells of nuclear (N = 100) and cytoplasmic (N = 100) LDs, respectively