MOG and infection: Other diagnostic criteria include blood exams that help detect infections, vitamin deficiencies, and presence of autoantibodies including anti-aquaporin-4 (APQ-4)-IgG autoantibodies, anti-myelin oligodendrocyte glycoprotein (MOG) autoantibodies, antinuclear antibodies (ANA), Ro/SSA, La/SSB, and HIV autoantibodies.