脑炎是现代神经病学中的重要课题之一。虽然已进行了大量的研究,但有关脑炎的很多问题目前仍不十分清楚。近几年来,在我省一些地区和国内许多地区一样,相继发现一组发病较急,以精神、意识障碍为主,有脑实质广泛损害表现的病人。经临床观察,很象是由病毒感染所引起的脑炎,但又与乙型脑炎等已知病因的脑炎有所不同,在未明病原以前,我们暂称之为“非特异 Encephalitis is one of the important topics in modern neurology. Although a great deal of research has been done, many issues concerning encephalitis are still not clear enough. In recent years, in some areas of our province and in many parts of China, one group of patients who have acute onset, mental disorder and disturbance of consciousness have been identified one after another, with extensive impairment of brain parenchyma. The clinical observation is very much like encephalitis caused by a viral infection, but differs from encephalitis of known etiology such as Japanese encephalitis. Before the unknown etiology, we tentatively called it "nonspecific