TABLE 3.

Macrophages microglia in gray and white matter of spinal cords

Donor cella	No. in
	total spinal cord	gray matter	white matter
B6	422 ± 60b	209 ± 30b	213 ± 38
IFN-γ−/−	213 ± 23	56 ± 8	158 ± 20

^aEach group consisted of three individual animals that received CD4 T-cell-enriched splenocytes from B6 or IFN-γ^−/− mice. F4/80⁺ cells in 0.63-mm-wide cross-sections at eight levels within the spinal cords were counted.

^bA significant difference was observed in the numbers of F4/80⁺ cells in the total spinal cord and in gray matter between recipients of CD4 T-cell-enriched B6 and IFN-γ^−/− populations (P < 0.002) as measured by Student's t test.