GFAP and acute disseminated encephalomyelitis: The astrocyte marker glial fibrillary acidic protein (GFAP) was at a mean ± S.E.M. of 111,614 ± 14,822 pg/ml and 468,264 ± 51,590 pg/ml in control and FP patient ADE extracts, respectively, and 4,958 ± 592 pg/ml and 5,326 ± 755 pg/ml in control and FP patient NDE extracts.