ALB and bacterial meningitis: A correlation analysis with the eight standard diagnostic blood and CSF parameters showed that, in bacterial meningitis, PC ae C44:6 concentrations correlated most strongly with Q-IgG, Q-albumin and CSF protein concentration, i.e. parameters associated with dysfunction of the blood-CSF-barrier (BCB) and, in the case of protein concentration, potentially also tissue damage (Fig. 3a).