患者，女，万7岁，铁路职工。近两天来，患者及全家4人躯干、四肢不断出现豆粒大鲜红色丘疹和稍大些风团样皮疹，并且逐渐增多，伴有剧痒。从发痒的丘疹和身上不断发现针头大深棕褐色的寄生虫。此虫能以极快地速度在患者身上移动，并且在吸血后整个虫体变成血红色，体积比未吸 Patient, female, million 7 years old, railway workers. In the past two days, patients and the whole family 4 people trunk, limbs appear large red bean papules and slightly larger wind-like rash, and gradually increased, accompanied by drama itch. From the itchy papules and the body constantly find the needle deep dark brown parasite. This insect can move very fast in the patient’s body, and after the blood-sucking the entire body becomes blood-red, the volume is not suction