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Representative lesions developing in livers of mice infected for 4 months with Mycobacterium avium 25291. HE (a and c, 80×) and ZN (b and d, 80×) stainings of the organs of nude mice (a,b) and CD4−/− mice (c,d). HE stainings of the organs of CD8α−/− (e, 55×) and TCRδ−/− mice (f, 27×).
