Perturbed metabolite levels in mouse serum and brain at early and late stage malarial infection. All peak intensities have been calculated relative to the peak height of 0.132 mg/ml DSS present in every sample. Panels showing two metabolites represent overlapping 1H NMR resonances. Black = males, grey = females. * indicates p < 0.05 in comparison to the uninfected control of the same sex. # indicates p < 0.05 in comparison to the males of the same infection time-point. S = serum, B = brain.