在巴西亚马逊地区，新发现卵形库道虫寄生于淡水鲶鱼（Trachelyopterus galeatus，鲇形目：陶乐鲶科）。
New occurrence of Kudoa orbicularis parasitizing the freshwater catfish Trachelyopterus galeatus (Siluriformes: Auchenipteridae) in the Brazlian Amazon region.
作者信息
Santos Weverton John Pinheiro Dos, Silva Diehgo Tuloza da, Santos Patrícia de Fátima Saco Dos, Matos Edilson Rodrigues, Hamoy Igor Guerreiro
机构信息
Programa de Pós-graduação em Aquicultura e Recursos Aquáticos Tropicais - AqRAT, Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil.
Laboratório de Pesquisa Carlos Azevedo, Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil.
出版信息
Rev Bras Parasitol Vet. 2019 Jul 29;28(3):416-424. doi: 10.1590/S1984-29612019047.
The aim of this was describe an infection by Kudoa orbicularis in freshwater catfish Trachelyopterus galeatus. A sample of 80 specimens of T. galeatus was collected in the municipality of Cachoeira do Arari, Marajó Island, in the state of Pará, Brazil. Pseudocysts were found in the muscle fibers of the epaxial and hypaxial regions of 85.0% of the specimens analyzed, reflecting a high infection rate. The pseudocysts contained spores that were pseudo-square in shape, with a mean length of 4.65 µm (range: 4.04-5.54) and mean width of 1.53 µm (1.56-1.74). Analyses on the morphology of the spores and a partial 934-bp sequence of the SSU rDNA gene confirmed that the microparasite was Kudoa orbicularis. This is the second record of this microparasite in a siluriform host in the Brazilian Amazon region.
本文旨在描述淡水鲶鱼 Trachelyopterus galeatus 感染圆形库道虫（Kudoa orbicularis）的情况。在巴西帕拉州马拉若岛阿拉里瀑布市采集了 80 份 Trachelyopterus galeatus 样本。在分析的 85.0%的样本的轴上肌和轴下肌区域的肌纤维中发现了假囊肿，这反映出感染率很高。假囊肿中含有孢子，这些孢子呈假方形，平均长度为 4.65 µm（范围：4.04 - 5.54），平均宽度为 1.53 µm（1.56 - 1.74）。对孢子形态和小亚基核糖体 DNA（SSU rDNA）基因的部分 934 碱基对序列的分析证实，该微寄生虫为圆形库道虫。这是该微寄生虫在巴西亚马逊地区鲶形目宿主中的第二次记录。
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