Spironucleus-associated necrotic enteritis in angelfish (Pterophyllum scalare).
Spironucleus-associated necrotic enteritis in angelfish (Pterophyllum scalare).
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神仙鱼（Pterophyllum scalare）螺核相关的坏死性肠炎。
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
H. Ferguson
中科院分区：
文献类型：
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作者：
G. O'Brien;V. Ostland;H. Ferguson
有鞭毛的原生动物属于六线虫属和螺旋核属，是一种常见的鱼类胃肠道寄生虫，包括鲑科、鲤科和水族科(1-3)。事实上，根据一项对一种据报道困扰这种经济上重要的水族馆鱼种的“神秘疾病综合症”的调查，六丝虫是天使鱼(Pterophyllum Scalare)中最常见的肠道寄生虫。六线虫感染并不总是导致临床疾病(1、3、4、5)，但当受感染的鱼受到压力时，如水质恶化、过度拥挤或营养不足(1、4、5、6)，确实会发生这种情况。在这种情况下，寄生虫迅速繁殖，它们大量出现在胃肠道内与厌食、体重减轻、虚弱有关，在极端情况下，还会导致卡他和出血性肠炎(1、2、5-7)。损失可能很高，其中包括繁殖鱼类的直接死亡以及幼鱼数量的减少，因为患病的成鱼不是适当的育种者，六角体可能会减少卵的数量或导致幼鱼在孵化和感染后死亡(4，5)。到目前为止，与这些寄生虫相关的组织病理学信息很少(2-4，8)。本报告的目的是介绍一次天使鱼螺旋体核增多症暴发的大体和组织病理学结果，并描述一种明显有效的控制方法。为繁殖目的而饲养的成熟神仙鱼作为交配对被饲养在15加仑的水族箱中，作为
Flagellated protozoa of the family Hexamitidae, belonging to the genera Hexamita and Spironucleus, are commonly encountered gastrointestinal parasites of a variety of fish, including salmonids, cyprinids, and aquarium species (1-3). Indeed, hexamitids are the most frequently encountered enteric parasite in angelfish (Pterophyllum scalare), according to an investigation into a "mystery disease syndrome" reported to afflict this economically important species of aquarium cichlid (4). Hexamitid infections do not always result in clinical disease (1,3,4,5), but this does occur when infected fish are subjected to stressors, such as deteriorating water quality, overcrowding, or inadequate nutrition (1,4,5,6). Under such conditions, the parasites multiply rapidly, and their presence in large numbers within the gastrointestinal tract is associated with anorexia, weight loss, weakness, and in extreme cases, catarrhal and hemorrhagic enteritis (1,2,5-7). Losses can be high, and they include direct mortality of breeding fish, as well as a reduction in the number of young, since sick adults are inadequate breeders and hexamitids may reduce the number of eggs or cause death of young fry after hatching and infection (4,5). To date, there is little information on the histopathology associated with these parasites (2-4,8). The purposes of this report are to present the gross and histopathological findings in an outbreak of spironucleosis in angelfish, and to describe an apparently effective means for its control. Mature angelfish kept for breeding purposes were held as mating pairs in 15 gallon aquaria, as part of