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首页> 外文期刊>Journal of Fish Diseases >Occurrence of postmortem myoliquefactive kudoosis in Atlantic mackerel, Scomber scombrus L., from the North Sea.
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Occurrence of postmortem myoliquefactive kudoosis in Atlantic mackerel, Scomber scombrus L., from the North Sea.

机译：来自北海的大西洋鲭鱼（Scomber scombrus L.）发生了尸体性液化性假性菌病。

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摘要

Members of the myxosporean genus Kudoa occur in various marine teleosts worldwide. Several species are of concern to the fishery and aquaculture industries as they may produce unsightly cysts in the fish host's musculature or are associated with postmortem myoliquefaction of the fish muscle, commonly referred to as 'soft flesh'. This study describes the occurrence and effects on a host of a Kudoa species in Atlantic mackerel, Scomber scombrus, from the northern North Sea. Generalized postmortem myoliquefaction associated with Kudoa sp. occurred in 0.8% of the examined fish, i.e. 11 of 1339 mackerel developed 'soft flesh'. There was a significant difference in the prevalence of myoliquefaction between medium sized (400-600 g) and large mackerel (600 g). The prevalence reached 8.9% in the latter host size group. No subclinical infections of Kudoa sp. were detected when examining fresh muscle (n = 103) and blood (n = 165) samples for spores using light microscopy. Affected mackerel developed generalized myoliquefaction after 38-56 h post-catch. No inflammatory host response was associated with the presence of plasmodia within single body muscle fibres of 'soft flesh' affected fish. Based on comparison of myxospore dimensions and analysis of the nuclear small subunit (SSU) ribosomal DNA, the present Kudoa species is assigned to Kudoa thyrsites. However, due to the species' apparently very wide geographical distribution and host range, its varying effect on different fish host species, together with the still unknown life cycle of Kudoa spp., the taxonomic status of K. thyrsites appears not to be fully resolved.
机译：粘孢子菌属Kudoa的成员遍布世界各地的各种海洋硬骨鱼中。渔业和水产养殖业担心几种物种，因为它们可能在鱼寄主的肌肉组织中产生难看的囊肿，或与鱼肌肉的事后肌体液化有关，通常被称为“软肉”。这项研究描述了北海北部大西洋鲭鱼（Scomber scombrus）中一种古多（Kudoa）物种的发生及其影响。与Kudoa sp。相关的广义验尸肌液化。在被检查的鱼中有0.8％发生这种情况，即1339鲭鱼中有11条发展为``软肉''。中型（400-600 g）和大鲭鱼（> 600 g）之间的淀粉液化发生率存在显着差异。在后者的宿主大小组中，患病率达到8.9％。库杜氏菌没有亚临床感染。使用光学显微镜检查新鲜肌肉（n = 103）和血液（n = 165）样品中的孢子时可以检测到。捕捞后38-56小时后，受影响的鲭鱼发展为全身性脂化。没有发炎的宿主反应与“软肉”感染鱼的单身肌纤维内的疟原虫存在有关。基于对粘孢子大小的比较和对核小亚基（SSU）核糖体DNA的分析，将当前的Kudoa物种分配给Kudoa thyrsites。但是，由于该物种的地理分布和寄主范围很广，它对不同鱼类寄主物种的影响各不相同，再加上工藤的生命周期仍然未知，因此，水苏石的分类学地位似乎尚未完全解决。 。

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