GRM1 and infection: Grin2a expression was not modified when mice were infected at mid-stage disease (16-wpi) [F(2, 10) = 0.8174, p = 0.4690], whilst Grm1 expression is significantly reduced after infection at both early and midstage of disease [F(2, 10) = 5.843, p = 0.0209] (Figures 5E,F).