Testing all plasma samples (n = 30/group) at a dilution of 1:100 for autoantibodies against 49 neural autoantigens gave only two positive results, namely one healthy control with anti-CASPR2 autoantibodies (IgG) and one post-encephalitis mouse with anti-homer-3 autoantibodies (IgM). Here, CNTNAP2 is linked to viral encephalitis.