患儿女,1岁。因不规则低热、头痛、频繁性呕吐1个多月入院。入院前曾按乙型脑炎治疗。查体:体温37.2℃,神萎,前囟饱满,颈稍有抵抗,心肺正常。左下肢肌张力略增高,双侧巴氏征、克氏征、布氏征均阳性。实验室检查白细胞:26,800×10/L,中性0.64。脑脊液检查:无色,毛玻璃状,潘氏反应(+),白细胞数0.268×10/L,多形核0.31,单形核0.69,糖及氯化 Children, 1 year old. Due to irregular low fever, headache, frequent vomiting more than 1 month admission. Before admission, according to Japanese encephalitis treatment. Physical examination: body temperature 37.2 ℃, Shen Wei, full of anterior fontanelle, slightly resistant neck, normal heart and lungs. Left lower extremity muscle tone slightly increased, bilateral Pakistan’s sign, Kirschner sign, cloth sign were positive. Laboratory white blood cells: 26,800 × 10 / L, neutral 0.64. Cerebrospinal fluid examination: colorless, frosted glass, Pan’s reaction (+), leukocyte count 0.268 × 10 / L, polymorphism 0.31, monomorphic nucleus 0.69, sugar and chlorination