曼氏裂头蚴病动物模型的建立及诊治技术研究Ⅰ小鼠动物模型建立及感染后血清特异性IgG抗体变化

Establishment of an animal model of Sparganum mansoni infection and study on therapeutic methods Ⅰ Establishment of an animal model of Sparganum mansoni infection in mice and changes of serum specific antibody levels post-infection

目的建立曼氏裂头蚴感染小鼠动物模型,并观察感染后小鼠血常规及血清中特异性IgG抗体变化。方法从青蛙体内检获曼氏裂头蚴,以口服灌胃法感染昆明小鼠25只(3条/只)。于感染前2 d和感染后第2、7、14、21、28、35、42、49天采集小鼠血液,检测血常规(白细胞总数、红细胞总数、血红蛋白、血小板总数)及血清中特异性IgG抗体(ELISA法);于感染后第49天处死全部小鼠,解剖并仔细查找小鼠体内的曼氏裂头蚴。结果小鼠感染曼氏裂头蚴后,白细胞总数在第2天明显升高;血清中特异性IgG抗体于感染后第14天开始检出,于第21天从全部小鼠检出。在小鼠多个组织器官检出曼氏裂头蚴,其中以皮下肌肉多见。结论成功建立小鼠感染曼氏裂头蚴动物模型,该法造模简单、经济。白细胞及血清中特异性抗体检测可作为曼氏裂头蚴的辅助诊断方法。

Objective To establish an animal model of Sparganum mansoni(plerocercoid larva of S. mansoni) infection in mice and observe the changes of blood routine examinations and serum anti-sparganum antibody levels after the infection. Methods The spargana tapeworms were collected from frogs, and 25 Kunming mice were orally infected with the Sparganum tapeworms(3 tapeworms/mouse). Two days before the infection and 2,7, 14, 21, 28, 35, 42 days and 49 days after the infection,the peripheral blood samples of mice were collected for the blood routine examinations and the detections of anti-S. mansoni IgG antibody with ELISA. Forty-nine days after the infection, all the mice were sacrificed to find out the Sparganum tapeworms in the bodies of mice. Results The count of the total white blood cells was significantly elevated on the second day of the mice infected with Sparganum. The serum anti-Sparganum antibody was detected on the 14th day of the infection in some mice, and on the 21st day of the infection, the serum anti-Sparganum antibody was detected in all the mice. After the mice were sacrificed,the Sparganum tapeworms were found out in many tissues and organs, and especially in the subcutaneous tissues and muscle.Conclusion The establishment of animal model of Sparganum infection is successful in mice with the oral method, and white blood cells and serum specific IgG antibody detection can be used as auxiliary diagnosis methods of S. mansoni infection.