Figure 6.

A: Two-week-old recipient; 7 dpt; cervical spinal cord; no clinical signs. A cluster of four leukocytes at advanced stages of apoptotic cell death are invested by astrocytic cytoplasm moderately rich in glycogen granules. Original magnification, ×13,500. B: Elsewhere in the same specimen, a portion of an astrocyte (A) investing a lymphocyte (L) in an early stage of apoptosis, lies next to an apparently healthy oligodendrocyte (O). Original magnification, ×11,000. C: Detail from B showing the presence of a gap junction (arrows) between the plasmalemma of the oligodendrocyte (nucleus lower left) and the astrocyte (right), containing the lymphocyte (nucleus, upper right). Original magnification, ×60,000.