Umehara Azusa, Kosuga Yuko, Hirose Hitomi
Department of Marine Science and Resources, College of Bioresource Sciences, Nihon University, 1866, Kameino, Fujisawa, Kanagawa 252-8510, Japan.
Parasitol Int. 2003 Jun;52(2):165-8. doi: 10.1016/s1383-5769(02)00080-6.
The weedy sea dragon Phyllopteryx taeniolatus at an aquarium in Kanagawa Prefecture were found infected by protozoan ciliate, 2001. The infected fish in particular, showed sloughing of the epidermis. Fish with intense infections showed sloughing of the dorsal fin, depigmentation of skin, anal distension and accumulation of ascitic fluid in the body cavity. In biopsies, ciliates were detected only in fresh mounts of abdominal dropsy and in the mucus on the body surface. Histopathological studies revealed ciliates mainly infected the dermis, and induced extensive detachment of the epidermis from the skin. Based on the arrangement and shape of the buccal structure and the number of somatic ciliature, ciliates isolated from the fishes belonged to the order Scuticociliatida. We discuss the major factors that bring about the death of weedy sea dragons.
2001年，神奈川县一家水族馆里的叶形海龙（Phyllopteryx taeniolatus）被发现感染了原生动物纤毛虫。特别是受感染的鱼，出现了表皮脱落的情况。感染严重的鱼表现出背鳍脱落、皮肤色素沉着减退、肛门扩张以及体腔中腹水积聚。在活检中，仅在腹部积水的新鲜样本和体表黏液中检测到纤毛虫。组织病理学研究表明，纤毛虫主要感染真皮，并导致表皮与皮肤广泛分离。根据口部结构的排列和形状以及体表纤毛的数量，从这些鱼身上分离出的纤毛虫属于盾纤目。我们讨论了导致叶形海龙死亡的主要因素。
