兔体双腔吸虫调查和形态学研究

Investigation and Morphology Study of Rabbit Dicrocoeli- um (Digenea: Dicrocoelide)

经对宁夏4个地区1085只家兔和35只野兔的调查,发现有3种双腔属（Dicrocoelium）吸虫:矛形双腔吸虫（D.lanceatum）、东方双腔吸虫（D.orientalis）和中华双腔吸虫（D.chinensis）。其中后2种为宿主新纪录。它们在家兔中的感染率依次为4.2％、1.8％、0.4％,在野兔中的感染率依次为14.3％、5.7％、5.7％。中华双腔吸虫呈纺锤形,体长5.702～6.934mm,体宽1.091～1.549mm,长宽比4.9:1,睾丸并列,阴茎囊椭圆形并达腹吸盘前缘,卵黄腺起自于睾丸之后、卵巢之前水平处;其余2虫种的形态与记载的基本一致。

Throuth investigation of 1 085 domestic rabbits and 35 hares in 4 prefectures of the Ningxia Hui Autonomous Region, three parastic trematodes-Dicrocelium lanceatum. Dicrocoelium orientalis and Dicrocoelium chinensis were found. Among them the last two were new records of the hosts. The infective rates were 4. 2%,1.8% and 0. 4% in the domestic rabbits and 14.3%, 5. 7% and 5. 7% in the hares, respectively. Dichocoelium chinensis is spindle-shaped, measures 5. 702-6. 904 mm by 1. 091-1.549 mm in size, with a lengh-width ratio of 4. 9:1. The testis keeping abreast with each other. An elliptical cirrus reaches nearly the front fringe acetabulum, and a vitellaria starts from the horizontal part between the posterior of testis and the anterior of ovary. The rest two have, on the whole, identical morphological features as those recorded in the past.