Postgraduate Programme in Environmental Biology (PPBA), Federal University of Pará (UFPa)/IECOS, Bragança, State of Pará, Brazil.
Carcinology Laboratory, Federal University of Pará (UFPa)/IECOS, Bragança, State of Pará, Brazil.
Parasitol Res. 2020 Jun;119(6):1743-1752. doi: 10.1007/s00436-020-06679-3. Epub 2020 Apr 22.
A new parasite species, Kudoa yasai n. sp. (Multivalvulida), is described from the king weakfish (Macrodon ancylodon), which is an important commercial fishery resource on the Brazilian Amazon coast. A total of 190 M. ancylodon specimens were obtained from the central fish market of the town of Bragança, and pseudocysts were found in the skeletal muscle fiber samples of all (100%) of the specimens, although no inflammatory reaction was observed in any of the cases. The myxospores are quadrate in shape with four polar capsules of equal size, 6.9 ± 0.94 μm long, 8.2 ± 0.39 μm wide, and 5.5 ± 0.60 μm thick. The polar capsules are 1.8 ± 0.26 μm in length and 1.4 ± 0.18 μm in width. The morphological and morphometric parameters, together with the phylogenetic analysis of a partial sequence of the 18S (SSU rDNA) gene, all indicate conclusively that Kudoa yasai n. sp. is a new species, distinct from all other Kudoa species. The study also verified the loss of quality in the meat of the host fish (M. ancylodon) sold in the Bragança market, which reinforces the need for the more systematic control of the quality of the product and the prevention of possible health problems for the consumer.
一种新的寄生虫物种，Kudoa yasai n. sp.（多瓣目），从王鲷（Macrodon ancylodon）中被描述出来，这是巴西亚马逊海岸重要的商业渔业资源。总共从 Bragança 镇的中央鱼市场获得了 190 个 M. ancylodon 标本，尽管在任何情况下都没有观察到炎症反应，但在所有标本的骨骼肌纤维样本中都发现了假囊肿。Myxospores 呈四边形，具有四个大小相等的极囊，长 6.9±0.94μm，宽 8.2±0.39μm，厚 5.5±0.60μm。极囊长 1.8±0.26μm，宽 1.4±0.18μm。形态和形态计量参数，以及 18S（SSU rDNA）基因部分序列的系统发育分析，都明确表明 Kudoa yasai n. sp. 是一个新物种，与所有其他 Kudoa 物种不同。该研究还证实了 Bragança 市场出售的宿主鱼（M. ancylodon）的肉质质量下降，这加强了对产品质量进行更系统控制和预防消费者可能出现健康问题的必要性。
