FIG. 9.

Infection of central nervous system cells by KJ38. Brain and spinal cord paraffin sections were obtained 6 days after infection from SJL mice inoculated with 10⁴ PFU of KJ38. Sections were immunostained for viral antigen (dark) and counterstained with hematoxylin. Shown is a low-magnification (×5 objective) of the hippocampal region (left panel) and a higher magnification (×40 objective) of the spinal cord, showing an infected neuron (right panel). White arrows point to a few infected cells.