Figure 2. Histology and immunohistochemical staining of the cerebral cortex in a 28-year-old woman from Romania with untreated AIDS and measles inclusion-body encephalitis. A) Histology shows moderate increased cellular density and absence of nuclear inclusion bodies. Hematoxylin and eosin stain; original magnification ×100. B) Immunohistochemical staining microglial activation with high CD163 immunoreactivity Anti-human CD163 monoclonal antibody; original magnification ×100 and (inset) ×400.