CD68 and Sepsis: The ACB scale significantly correlated with both MHC-II and CD-68 positive microglia counts in putamen of control patients (Spearman’s rho 0.617 and 0.602 respectively) and negative correlations were found with ACB scores and microglia counts in the hippocampus (Spearman’s rho − 0.394, all patients combined) and in the putamen (Spearman’s rho − 0.555 in sepsis patients).