从江及都匀地区牛带绦虫试验感染猪牛后从囊尾蚴寄生部位鉴别虫种

THE EXPERIMENT ON DIFFERENTIATING SPECIE ACCORDING TO PARASITIC SITE OF AFTER INFECTING CALF OR PORKET BY TAENIA SAGINATE FROM CONGJIANG AND DUYUN

目的观察从江及都匀牛带绦虫感染牛、猪的寄生部位分布及其形态鉴别虫种.方法取贵州从江县及都匀市牛带绦虫病人虫体的3节孕节(约30 000～40000虫卵)直接喂养14日龄约克种乳猪2头和17日龄荷兰乳牛犊2头,于62日龄、67日龄剖杀,观察囊尾蚴分布、形态、测量大小,观察成熟情况.结果都匀牛带绦虫试验感染猪、牛,其囊尾蚴寄生在肝脏.从江牛带绦虫试验感染牛,其囊尾蚴寄生在全身肌肉,感染猪则仅寄生在肝脏.从江及都匀牛带绦虫感染猪牛后,两者囊尾蚴寄生部位不同.都匀牛带绦虫感染的猪囊尾蚴原头节有两圈类似小钩的点状结构,而从江牛带绦虫感染猪后原头节无小钩.结论根据从江及都匀牛带绦虫感染牛、猪后囊尾蚴的寄生部位及其原头节小钩的差异,可以证实都匀牛带绦虫是亚洲牛带绦虫.

Object To study configuration and distribution of parasitic site of after infecting calf or porket by Taenia saginate from Congjiang andDuyun. Method Three pregnant proglottids (containing (30 000)～(40 000) spawns) were taken out from each patient infected by Taenia saginata in Congjiang county and Duyun city. Two fourteen-day Yoko porkets and two seventeen-day Holstein calf were directly feed by these pregnant proglottids and killed on the 62 day or 67 day. Then dissection and observation was conducted for distribution, configuration, size, maturity of cysticercus. Results Duyun Taenia saginata can infect porket and calf with their cysticercus parasitizing in liver. Congjiang Taenia saginata can infect calf with their cysticercus parasitizing in whole muscle and infect porket with cysticercus parasitizing in liver. Parasitic sites of cysticercus were different from Congjiang Taenia saginata and Duyun Taenia saginata after infecting calf or porket. Cysticercus’s scolex of Duyun Taenia saginata in porket has two rounds of dot-structure like little hooks, which cysticercus’s scolex of Congjiang Taenia saginata in porket and calf has no hamulus structure. Conclusion Duyun Taenia saginata can be verified as Taenia saginata asiatica through difference in parasitic site and hamulus structure of scolex after infecting calf or porket.