卫氏并殖吸虫体表乳突的扫描电镜观察

OBSERVATION ON SCANNING ELECTRON MICROSCOPE THE SURFACE PAPILLAE OF PARAGONIMUS WESTERMANI

应用扫描电镜观察卫氏并殖吸虫体表乳突、小鼠体内滞育童虫见有大、小两型丘状乳突；位于口吸盘周缘的１２个乳突和腹吸盘内缘的６个及外缘的１２个乳突，相对稳定。猫体内虫体，除丘状乳突外，还见有花瓣状乳突存在，后者见于虫体背、腹面，散在分布。６２日龄成虫，口吸盘周缘６个乳突外周，还有１０个乳突分布，腹吸盘周缘仍保留着６个乳突。两种宿主体内虫体乳突的数量，均随虫龄增长而渐少。结果提示：１．无论小鼠体内处于发育停滞状态的虫体，还是终宿主体内的虫体，乳突的数量变化均与伴随虫龄增长，虫体由活跃移行转为定居的行为有关；２．体表乳突的形态、数量和分布，也可因宿主种类而异。

The surface papillae of P.westermani were observed by using scanning electron microscope.On the surface of diapause juveniles from mice,two types of knoblike papillae were found.The distribution of 12 papillae situated on the circles of the oral suckers as well as 6 and 12 papillae situated respectively on the ento-circles and out-circles of the ventral suckers were relatively stable.On the worms from the cats,two types of papillae were found as follow:1.knoblike papillae.2.rosette-form papillae.Their number and distribution were obvious different from that of the worms from mice.It was also observed that numbers of the papillae reduced gradually with the increase of the worm age.The results suggested that the structure,number and distribution of the surface papillae of P. westermani could be different due to the worm age and the species of the hosts.