Figure 1.

CSF pleocytosis is primarily lymphocytic and monocytic. Leukocyte differential count in CSF cytospin-smears showing the percentage of neutrophils, macrophages, lymphocytes, plasma cells and eosinophils found over time in animals with a pleocytosis higher than 50 cells/μL (A. EL81, B. DR50, C. DH50, D. EP51).