自 1998年 6月上旬开始 ,丹东市各医院的门诊部陆续接诊了腹痛、腹泻、发热、乏力、胸闷、气急、胸痛伴有胸腔积液或自发性气胸等临床表现的患者 ,化验室检查 ,嗜酸细胞明显增高。分别以急腹症、阑尾炎、胸膜炎、肺结核病等收入院。经对症治疗后 ,收效甚微 ,发病人数逐日上升。 Since the beginning of June 1998, the outpatient clinics of hospitals in Dandong City have successively taken in patients with clinical manifestations of abdominal pain, diarrhea, fever, fatigue, chest tightness, shortness of breath, chest pain associated with pleural effusion or spontaneous pneumothorax, laboratory tests , Eosinophils increased significantly. Respectively, acute abdomen, appendicitis, pleurisy, tuberculosis and other income homes. After symptomatic treatment, with little success, the number of patients increased daily.