Ahmad N, Noakes D E
Department of Large Animal Medicine and Surgery, Royal Veterinary College, Hatfield, Hertfordshire.
Vet Rec. 1995 Jul 29;137(5):112-7. doi: 10.1136/vr.137.5.112.
The semen quality, plasma testosterone concentrations and ultrasonographic changes were studied for up to 20 weeks after the unilateral vasectomy of two adult goats and two rams, and the gross and histological changes were examined post mortem. An intact ram and an intact goat served as controls. There was a marked decrease in the sperm concentration and the total numbers of sperm per ejaculate in both species. However, there seemed to be no effect on ejaculatory volume, mass motility and individual motile sperm, percentages of dead and abnormal sperm and plasma concentrations of testosterone. Ultrasonographically, the epididymal tail lost its characteristic heterogeneous texture and appeared enlarged. Anechoic masses, representing sperm granulomata, were visible within the epididymal tail of both the rams, and the epididymal head of one of the goats and at the cut end of the vas deferens in the other. They were observed as early as four to six weeks after surgery and their nature was confirmed post mortem. The sequential ultrasonographic changes in the testis and the epididymis are described.
对两只成年山羊和两只公羊进行单侧输精管切除术后，研究其长达20周的精液质量、血浆睾酮浓度及超声变化，并在死后检查大体和组织学变化。一只完整的公羊和一只完整的山羊作为对照。两个物种的精子浓度和每次射精的精子总数均显著下降。然而，对射精量、总体活力和单个活动精子、死精和异常精子百分比以及血浆睾酮浓度似乎没有影响。超声检查显示，附睾尾部失去其特征性的不均匀质地并出现肿大。在两只公羊的附睾尾部、其中一只山羊的附睾头部以及另一只山羊输精管的切断端可见代表精子肉芽肿的无回声团块。它们最早在手术后四至六周被观察到，其性质在死后得到证实。本文描述了睾丸和附睾的系列超声变化。
