新疆北部骆驼源细粒棘球绦虫发育和形态特征

目的：研究新疆北部双峰驼细粒棘球绦虫的发育与形态特征。方法：用棘球蚴原头节感染家犬,观察成虫在犬体内的发育。对３５ｄ成虫进行形态学的观察和描述。结果：用原头节感染的６只家犬,在感染后３５ｄ和４５ｄ用槟榔碱驱虫,每只犬驱出成虫１４７８０至１３５９００条。３５ｄ的成虫中有１０％虫体已含有厚壳虫卵,表明有感染性。７７％的成熟体节位于虫体末端,最多体节数为３。虫体总长２．５±０．７ｍｍ,成虫平均顶突钩数３２．７±１．２,外形光滑。平均睾丸数３２．４±３．９,分布于整个成熟体节,在卵黄腺后排成一排。卵巢明显较长,有不明显的分叶,卵黄腺长形并掩盖梅氏腺。结论：新疆北部双峰驼细粒棘球绦虫在形态学上与北非骆驼株细粒棘球绦虫相似,可能是分布在我国的细粒棘球绦虫骆驼株。但与骆驼株亦有不同之处,应进一步鉴定。

CHARACTERISTICS OF DEVELOPMENT AND MORPHOLOGY OF ECHINOCOCCUS GRANULOSUS OF CAMEL ORIGIN IN NORTH XINJIANG

AIM: To study the characteristics of development and morphology of E. granulosus of camel origin in north Xinjiang. METHODS: Six dogs were infected with protoscolices and then purged with arecoline at days 35 and 45 p.i. RESULTS: Six dogs were heavily infected, the worm burden were 14,780 to 135,900 at days 35 and 45 p.i. At day 35 p.i. 77% of the had developed three segments, 10% contained mature eggs with fully developed "thickshelled" embryophores. Morphological studies revealed the following characteristics for 35-day-old worms; the mean length of the terminal segment accounted for 56% of the total worm length; the position of the sexually mature segment was always terminal (77%); the female reproductive system possessed an enlongated ovary with compact lobules; the Mehlis gland was covered by the vitelline gland and the testes were distributed throughout the segment arranging in a row posterior to the vitelline gland. CONCLUSION: The E. granulosus of camel isolate in north Xinjiang can readily be distinguished from the horse, sheep, cattle and pig strains, but is similar to the camel (Camelus dromedarius) strain distributed in North Africa.