A Microsporidian Species from Yellowtail Juveniles, Seriola quinqueradiata, with “Beko” Disease
A Microsporidian Species from Yellowtail Juveniles, Seriola quinqueradiata, with “Beko” Disease
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患有“Beko”病的黄尾鱼幼鱼 Seriola quinqueradiata 的一种小孢子虫
DOI：
10.3147/jsfp.16.187
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发表时间：
1982
期刊：
影响因子：
0.6
通讯作者：
S. Egusa
中科院分区：
文献类型：
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作者：
S. Egusa
研究了一种侵入黄尾鱼幼鱼（Seriola quinqueradiata）躯干肌肉并引起“Beko”病的小孢子虫物种。寄生虫在肌肉的横截面中表现为多种形式的肿块，在纵向切片中通常表现为细长的肿块。这些肿块的外部被宿主产生的纤维膜所包围。几乎所有寄生虫都清楚地代表了孢子形成序列的各个阶段。孢子生殖被认为是通过孢子原质体的多次分裂而发生的。孢子被、孢子生殖液泡和全孢子母细胞膜不存在。在任何孢子形成阶段均未证实双核体。新鲜孢子呈卵圆形，尺寸为2.9-3.7×1.9-2.4μm，孢子膜内有卷绕的极管。挤压极管的长度为44-52μm。该物种无法归入任何已确定的属，因此暂时将其归入微孢子虫收集组似乎是合适的。提议将其命名为 M. seriolae。具体名称是指宿主的属名。
A microsporidian species which invades the trunk muscle of yellowtail juveniles (Seriola quinqueradiata) and causes “Beko” disease was studied. The parasites appeared as multiform masses in cross sections of the muscle and usually elongated masses in longitudinal sections. The masses were bounded externally by a host-produced fibrous membrane. Almost all the parasites clearly represented stages in the sporulation sequence. Sporogony was believed to occur by multiple fission of sporogonial plasmodia. Sporocyst, sporogony vacuole and pansporoblast membrane were absent. The diplocaryon was not confirmed in any sporulation stage. Fresh spores were ovoid and measured 2.9-3.7×1.9-2.4 μm and had a coiled polar tube within the spore membrane. Extruded polar tubes were 44-52 μm in length. This species could not be classified in any established genus and therefore it seemed appropriate to place it provisionally in the collecting group Microsporidium. The name M. seriolae was proposed. The specific name refers to the genus name of the host.