(ɛnˌsɛfəˈlaɪtədʒən) n (Pathology) an agent that is able to produce encephalitis
encephalitogen
en·ceph·a·li·to·gen
(en-sef'ă-lī'tō-jen), An agent that evokes encephalitis, particularly with reference to the antigen that produces experimental allergic encephalomyelitis. [encephalitis + G. -gen, producing]