长春市旋毛虫幼虫性别鉴别的探讨

DIFFERENTIATION OF THE SEX OF TRICHINELLA LARVAE COLLECTED IN CHANGCHUN

取自长春市犬的肌肉内旋毛虫幼虫的直肠长度,雄虫平均为54.39(50.4—60.3)μm,雌虫为28.35(18.9—31.5)μm,雄虫长约为雌虫的2倍。雄虫生殖原基尚未分化,雌虫已分化,可见受精囊原基和子宫原基,前者为颗粒状小团块,深褐色,后者为一纵列数个细胞构成,两原基全长平均为62.18(50.4—75.6)μm。上述结果并通过感染实验加以证实。按上列指征检测幼虫的雌雄性比率为1.82:1(1.17—2.59:1)

The length of the rectum in male Trichinella spiralis larvae is about twice that in female larvae, being 54.39(50.4-63.0) Mm in males and 28.05(18.9-31.35) Mm in females. The gonad rudiment of the female larvae has already differentiated obviously into semin-ral receptacle rudiment and uterus rudiment, while that of the male larvae remains undiffe-wntiated. The seminal receptacle rudiment is a granular, small mass and dark brown in color, while the uterus rudiment is composed of a column of several cells, and the total length of these two rudiments is 62.18 (50.4-75.6)Mm. Verifications through experimental infections proved that the length of rectum and the degree of differentiation of gonad rudiment might be used as indices to identify the sex of larvae.It was found that the sexual ratio of T. spiralis collected in Changchun was 1.82:1 (1.17-2.59:1).