More activated CD69+ T cells infiltrated the brains of IN- than FP-inoculated mice.

<p>Leukocytes were isolated from the brains of IN- and FP-inoculated mice. In an initial experiment, of the proportion of (A) CD45⁺ cells that were (B) CD3⁺ T cells were determined. In a follow-up experiment, the proportion of (C) CD4⁺ and (D) CD8⁺ T cells in the brains of IN-inoculated mice and FP-inoculated mice were determined. The proportion of T cells that stained positive for activation marker CD69 are shown in (E) CD3⁺/CD4⁺/CD69⁺ and (F) CD3⁺/CD8⁺/CD69⁺.Means based on groups of 3 mice per time point.