Figure 10.
M. microti tuberculous lesion in a field vole. Epithelioid cell in granulomatous infiltrate. (a) The cell exhibits several foci of mineralization (consistent with mitochondria) in the cytoplasm (arrows). Arrowheads: nonmineralized mitochondria. N, nucleus. (b) Cytoplasm. Beside variably swollen, nonmineralized mitochondria (arrowheads), there are 3 markedly enlarged and mineralized mitochondria, in one of which remnants of the normal mitochondrial structures are still evident (arrow). Uranyl acetate and lead citrate contrasting.