Figure 1From: Expression of innate immune complement regulators on brain epithelial cells during human bacterial meningitisStructural and ultrastructural (electron microscopy) analyses of human brain tissue sections obtained from the ependymoma (case 9945) and meningitis cases. Aa. H&E staining of paraffin embedded wax tissue sections; original magnification, ×200. The presence of perivascular rosette (Ro) formation is typical of an ependymoma. Ab. Electron micrographs taken of the araldite-enhanced ependymoma cells. Original magnification, ×13500; inset: original magnification, × 23000. The white arrows indicate junction complexes between cells and the black arrows indicate microvilli (see inset). These structures reveal key characteristics of ependymal cells. Ba, Bb, Meningitis cases. Original magnification, ×100. Choroid plexus (a) and ependyma (Ep) (b) show a continuous layer of intact epithelial cells despite the presence of neutrophils (PMN) inside the ventricle (particularly in panel Bb, see inset, magnification ×1000). V, vessel; Cp, choroid plexus; Ep, ependymal layer.Back to article page