患儿陈××,女,23天,县干部家属。因皮肤发紫3天,于1974年4月8日被送入院。现病史:患儿的母亲于4天前进食隔晚购回韭菜,量约2～3市两,次日病儿出现全身皮肤发紫,持续3天未见缓解。近2天发热,轻咳。病儿以吮母乳为主,间饮服葡萄糖水,无服韭菜汤史。患儿的母亲在产后曾多次服新鲜购回韭菜而未见婴儿出现皮肤发紫。此外其母亲没吃其它蔬菜或特别饮食史。体检:体温肛探39℃,重病容,嗜睡,口唇及全身皮肤明显发紫绀,呼吸80次/分,无鼻煽,无三凹征,前囱平,咽中度充血,扁桃体轻度红肿,心率 Chen × × children, female, 23 days, county cadres and relatives. Due to skin purple 3 days, on April 8, 1974 was admitted to hospital. History of illness: children’s mothers eat leek four days before eating late, the amount of about 2 to 3 City two, the next day the child appeared systemic skin purple, sustained for 3 days no relief. Nearly 2 days fever, light cough. Suckling children to breast milk, drink glucose water, without service leek soup history. Children with mothers in the postpartum have repeatedly served fresh buy leeks and no baby appeared purple skin. In addition his mother did not eat other vegetables or special diet history. Physical examination: temperature anal 39 ℃, severe disease, lethargy, lips and systemic skin was significantly cyanotic, breathing 80 beats / min, no nasal fan, no three concave sign, the former Huanping, pharyngeal moderate congestion, mild tonsil swelling, Heart rate