Intrathecal synthesis of complement components C3c and C4 in the central nervous system infections with signs of the acute serous meningitis syndrome

Two hundred and ten patients with meningismus and the infections of the central nervous system (CNS) with the clinical symptoms and signs of the acute serous meningitis syndrome, were divided into groups according to etiology (enterovirus meningitis-ENTERO, serous meningitis various etiology-SM and tuberculosis meningitis-TBC). Intrathecal synthesis (ITS) of C3c and C4 complement components and IgG were determined by the method of cerebrospinal indexes (I), to examine their role in differential diagnosis of this syndrome. Correlative study between the CSF/serum ratio (Q) for albumin (Alb) and QC3c and QC4 in patients with no proven ITS of this two complement proteins, and the comparative study of the increased value of C3cI and C4I (and IgGI) between the examined groups of the patients was done. Highly significant correlations were found between QAlb and QC3c (r = 0.89, p