CD45+ cells in the organum vasculosum of the lamina terminalis (OVLT). Some CD45+ cells, which are not exclusively associated with the MECA-32+ capillaries can be detected within the OVLT of healthy SJL mice (lower two panels; Ø = healthy control). During EAE there is an increased number of CD45+ cells present within the OVLT (upper two panels; EAE). Immunoperoxidase, hematoxylin counterstain. Bar = 100 μm. This result was observed in at least 10 individual stainings.