十二指肠钩虫和美洲钩虫在动物宿主体内发育各期的形态观察  

OBSERVATIONS ON THE MORPHOLOGY OF DEVELOPING STAGES OF ANCYLOSTOMA DUODENALE AND NEGATOR AMERICANUS

作　　者：蒋华 强慧琴 Jiang Hua;Qiang Huiqin(Institute of Parasitic Diseases,Chinese Academy of Medical Sciences)

机构地区：[1]中国医学科学院寄生虫病研究所

出　　处：《Zoological Research》1984年第2期109-115,I0001,共8页动物学研究（英文）

摘　　要：作者观察了十二指肠钩虫和美洲钩虫分别在幼犬和仓鼠体内不同发育时期的形态变化。两种钩虫在皮肤和肌肉内的形态与侵入宿主前的第3期幼虫相似。在肺内美洲钩虫发生明显的形态变化,而十二指肠钩虫则否。十二指肠钩虫第4期幼虫口腔的长宽几乎相等,但美洲钩虫宽大于长。此时美洲钩虫雌虫阴门位于虫体中横线之后,但到第5期幼虫和成虫时已位于中横线之前。两种钩虫第5期幼虫真口腔腹侧面各有一对管状开口,尤以十二指肠钩虫的明显。另一对管状开口位于真口腔的背侧面,此则以美洲钩虫者明显。第4期幼虫的性别除雌虫的阴门外,还可从虫体的尾部加以区别。两种钩虫雄虫交合伞前面侧腹处各有一对螺旋形感觉器。同时在泄殖腔开口处各有二对乳突,但在形态上两种钩虫有明显区别。此外,还观察到美洲钩虫交合伞侧肋内缘有一对小乳突以及雌虫尾部末端具一棍棒状尾刺。Morphological changes of Ancylostoma duodenale and Necator americ-anus at various development stages in animal hosts (young dogs and golden hamsters) were studied.Both species during their skin and muscle stages are similar to the 3rd stage larvae before entering hosts.In host’s lung,TV.arnericanus undergoes some obvious changes but not A.duodenale.In the 4th stage larvae,the length of mouth cavity of A.duodenale is almost equivalent to its width,but that of N.americanus is shorter.At that stage,the vulva of N.americanus is situated at the posterior part of its body;while in the 5th stage larvae and adult,it is at the anterior part.There is a pair of openings on the sub-ventral part of mouth cavity in both species,but more prominent in A,duodenale.Another pair of openings occur in the deep sub-dorsal part of the mouth cavity,more prominent in TV.americanus.At the 4th stage,besides the vulva,worm sex can also be distinguished by its tail.A pair of spiral phas-rnids are found in the anterior ventral part of bursa.Two pairs of papillae on the dorsal surface of either side of closcal openings are found in both species,but obvious differences in morphology between two species.In addition,it is observed for the first time that there is a pair of small papillae in the position of lateral ray of bursa in male and a tail spicule in female of N.americanus.

关 键 词：十二指肠钩虫 美洲钩虫 动物宿主 交合伞 开口处 形态观察 感觉器 长宽 

分 类 号：R53[医药卫生—内科学]