Stephens F J
Research Division, Department of Fisheries, PO Box 20, North Beach, Western Australia 6920, Australia.
Aust Vet J. 2009 Jan-Feb;87(1):61-2. doi: 10.1111/j.1751-0813.2008.00380.x.
Specimens of western pygmy perch, Edelia vittata Castelnau 1873, were submitted for examination because of the presence of black masses in the body wall in the abdominal area. The owner reported that approximately 10% of mature fish in one dam were affected. The masses had no apparent effect on the health of affected fish, but they were unsuitable for sale for aesthetic reasons. After necropsy and histological examination, the masses were found to be microsporidial xenomas within the abdominal cavity. Transmission electron microscopy results suggest that this microsporidian is a previously unreported species, because the melanised xenoma wall and internal structure of the spores differ from previously described species. The epidemiology of the parasite remains largely unknown and highlights the need for further surveys of the disease status and parasites of Australian native fish, especially those of interest to aquaculturists.
由于在腹部区域的体壁出现黑色肿块，西侏儒鲈（Edelia vittata Castelnau 1873）的样本被提交进行检查。鱼主报告称，一个鱼塘中约10%的成熟鱼受到影响。这些肿块对受影响鱼的健康没有明显影响，但出于美观原因，它们不适合出售。经过尸检和组织学检查，发现这些肿块是腹腔内的微孢子虫异瘤。透射电子显微镜结果表明，这种微孢子虫是一个以前未报告的物种，因为黑化的异瘤壁和孢子的内部结构与先前描述的物种不同。这种寄生虫的流行病学在很大程度上仍然未知，这凸显了对澳大利亚本土鱼类的疾病状况和寄生虫进行进一步调查的必要性，特别是对水产养殖者感兴趣的那些鱼类。
