title: [Differentiation of the sex of Trichinella larvae collected in Changchun].
abstract: The length of the rectum in male Trichinella spiralis larvae is about twice that in female larvae, being 54.39 (50.4-63.0) microns in males and 28.05 (18.9-31.35) microns in females. The gonad rudiment of the female larvae has already differentiated obviously into seminal receptacle rudiment and uterus rudiment, while that of the male larvae remains undifferentiated. 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) microns. 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).
authors.affiliation: Department of laboratory animals, Norman Bethune University of Medical Science.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Liu
authors.forename: C
authors.initials: C
authors.lastname: Wang
authors.forename: C L
authors.initials: CL
authors.lastname: An
mesh_terms: D000818:Animals; D005260:Female; D007814:Larva / Q000033:anatomy & histology; D008297:Male; D051379:Mice; D012733:Sex Differentiation; D012744:Sex Ratio; D014234:Trichinella / Q000033:anatomy & histology* / Q000502:physiology