The frequency of patients with viral meningoencephalitis (TNF-α and IL-17 = 55 %) was higher in the high cellularity quarters (top and bottom right) of the 4-quarter graph when compared to frequency of patients with undiagnosed meningoencephalitis in those quarters (TNF-α and IL-17 = 37–38 %). Here, IL17A is linked to meningoencephalitis.