例1 男性,13岁。起病时低热、头昏、双脚无力,继而不能行走,以左侧为重。发病前4个月食过生蟹,无外伤史。体检:体温37.5℃,腰椎1～4脊突有压痛,下肢轻瘫,双大腿及腓肠肌有压痛,左侧为甚,皮肤温觉、痛觉尚存。腹壁及提睾反射减弱,双膝腱反射消失,跟腱反射左侧消失,右侧减弱。白细胞17,000,嗜酸40％;肺吸虫抗原皮试(简称“皮试”)阳性(卅),ELISA阳性(+)。脑脊液: Example 1 male, 13 years old. Low fever on onset, dizziness, weakness of feet, and then unable to walk to the left as the most important. Four months before the onset of edible raw crab, no history of trauma. Physical examination: Body temperature 37.5 ℃, 1 ~ 4 lumbar vertebra tenderness, lower extremity paresis, both thigh and gastrocnemius tenderness, the left is even more, the skin temperature, pain survived. Abdominal wall and cremasteric reflex decreased, double knee tendon reflex, Achilles tendon reflex left disappear, right weakened. Leukocyte 17,000, and eosinophilic 40%; Paragonimus spp. Skin test (“skin test”) was positive (卅); ELISA was positive (+). Cerebrospinal fluid: