藐小棘隙吸虫体被超微结构的扫描电镜观察  

OBSERVATION ON FINE STRUCTURESOF ECHINOCHASMUS LILIPUTANUSTEGUMENT BY SCANNING ELECTRONMICROSCOPY

作　　者：吴维铎 肖祥 吕大兵 汪天平 徐伏牛 陈孝龄[2] 

机构地区：[1]安徽省寄生虫病防治研究所,芜湖2410002 [2]安徽医科大学电镜室,合肥230032

出　　处：《中国寄生虫学与寄生虫病杂志》1997年第4期205-207,共3页Chinese Journal of Parasitology and Parasitic Diseases

摘　　要：目的 :观察藐小棘隙吸虫体被的超微形态学特征。方法 :采用扫描电镜观察实验犬体内藐小棘隙吸虫成虫的体表结构。结果 :该吸虫体被除头冠、腹吸盘和虫体亚末端外 ,均具有体棘 ,其以螺旋式规律排列成行 ,其间距由前向后逐渐增宽 ,但体棘大小基本不变。感觉乳突有 3种 ,其一是带触毛的扣状乳突 ;另两种不具触毛 ,为无触毛扣状乳突和丘状乳突 ,前者数量最多 ,分布最广。虫体表面不平坦 ,呈一定规律的凹凸状 ,不同部位具不同的体表结构。结论 :该虫体被超微结构是长期适应肠道内寄生而逐渐进化的结果 ,与肠道内寄生生活相适应 ,其特征在分类学上有一定意义。AIM:To observe the fine structures of tegument of Echinochasmus liliputanus. METHODS:Adult worms of E.liliputanus obtained from dogs experimentally infected with metacercariae of the worm were observed by scanning electronmicroscopy. RESULTS: Almost the whole body surface of the parasite is covered with shell- like spines exceptthat of the head collar,ventral sucker and posterior part of the body.The spines arranged in scrow rows are basically in the same sizes and shapes,but the intervals between them increase gradually from the anterior to the posterior part of the body.Three types of sensory papillae are found on the body surface,i.e.,one with sensory hairs and two without sensory hairs. The sensory papillae with sensory hairs are widely distributed on the surface of the oral sucker,head collar,and anterior two third of the body. On the acetabulum located 32 protruded papillae without sensory hairs.The three types of papillae are also present on the oral sucker.Of the three types of papillae,those with sensory hairs are the most abundant ones throughrut the entire tegument of the worm. CONCL USION:The ultrastructural characteristics of the tegumentof E.liliputanusare considered to be related to the evolutional adaptation to its parasitic environment,which may be taken as one of the bases in taxonomic studies.

关 键 词：吸虫 藐小棘隙吸虫 体被超微结构 电镜扫描 

分 类 号：R532.290.4[医药卫生—内科学]