1986年5月19日,扬中县某村给小学生作乙脑疫苗的加强接种(疫苗系上海生物制品研究所生产,地鼠肾细胞培养,甲醛灭活,批号8656-1,效期87.5),由乡村医生按常规每人皮下注射0.5ml,接种后6小时首例发病,表现为阵发性腹绞痛,无先兆,无腹泻呕吐,部分重者有恶心,腹痛部位不确定,压痛不明确,无反跳痛。一般每次发作持续2～5分钟,每天发作3、4次,发作时面色苍白,出冷汗,个别痛剧时有“昏倒”(家属及老师语),少数伴有干咳,无发热。患者饮食正常,不痛时如常人,多数仍能坚持上学,较重的5人持续时间较久。全部患儿注射局部无异常反应,血、尿常规及肝功能正常,部分患者大便有蛔虫卵(+)～(++),少数检出钩虫、鞭虫卵,隐血 May 19, 1986, a village in Yangzhong County for primary school students to strengthen the inoculation of Japanese encephalitis vaccine (vaccine produced by the Shanghai Institute of Biological Products, rat kidney cell culture, formaldehyde inactivation, batch number 8656-1, expiry 87.5), By the village doctor according to conventional subcutaneous injection of 0.5ml, 6 hours after inoculation the first case of onset, manifested as paroxysmal abdominal cramps, no aura, no diarrhea and vomiting, some were nausea, abdominal pain is not the location, indefinite tenderness , No rebound pain. Generally each episode lasts 2 to 5 minutes, episodes of 3 to 4 times per day, the onset of pale, cold sweat, individual pain drama “collapsed” (family members and teachers), a few with dry cough, no fever. Patients with normal diet, pain, such as normal people, most still insist on going to school, heavier 5 people last longer. All children with local injection of no abnormal reaction, blood, urine and liver function is normal, part of the patients stool have roundworm eggs (+) ~ (++), a small number of detected hookworm, whipworm eggs, occult blood