Khan R A
J Wildl Dis. 1975 Apr;11(2):205-9. doi: 10.7589/0090-3558-11.2.205.
Histological changes in the wall of the copulatory sac of normal adult female thorny skates, Raja radiata, were compared with those naturally infected with Trichodina oviducti. The parasites were associated with extensive defoliation of the copulatory epithelium and in some instances had penetrated the submucosa resulting in petechiae. An excessive exudated that appeared at the vent was made up of mucus, sloughed cells and parasites. It is speculated that shedding of the copulatory epithelium may be due to a hyaluronidase-like enzyme. Furthermore, the restriction of T. oviducti to adult skates may be dependent on the presence of certain mucopolysaccharides that are very low or absent in immature skates.
将正常成年雌性棘鳐（Raja radiata）交配囊壁的组织学变化与自然感染输卵管三毛滴虫的情况进行了比较。这些寄生虫与交配上皮的广泛脱落有关，在某些情况下还穿透了黏膜下层，导致瘀点。泄殖孔处出现的过多渗出物由黏液、脱落的细胞和寄生虫组成。据推测，交配上皮的脱落可能是由于一种类似透明质酸酶的酶。此外，输卵管三毛滴虫对成年鳐鱼的限制可能取决于某些黏多糖的存在，而这些黏多糖在未成熟鳐鱼中含量极低或不存在。
