FIG. 3.

Patterns of the intrathecal immune response (IgG, IgA, and IgM classes) in eosinophilic meningitis at the time of clinical recovery. The data of 21 patients refer to the second puncture routinely done 7 days after the first, diagnostic puncture done at the time of admittance to the hospital. All of the patients showed an intrathecal humoral immune response; in 18 of 21 cases, it was a two-class (IgG and IgA) response, and in 5 of 13 cases, it was a three-class (IgG, IgA, and IgM) response. In the eight patients missing in the IgM diagram, IgM concentrations in CSF were below the detection limit of the assay.