Nguyen Thinh Cong, Li Ying-Chun, Makouloutou Patrice, Jimenez Lea AngSinco, Sato Hiroshi
Laboratory of Parasitology, Department of Veterinary Medicine, Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Japan.
J Vet Med Sci. 2012 Oct;74(10):1367-72. doi: 10.1292/jvms.12-0025. Epub 2012 Jun 1.
The northern snakehead Channa argus, native to China, Russia and Korea, is currently found widespread throughout Japan following its original introduction during the 1920s. A parasitological study of 10 snakeheads fished from the Fushinogawa River running through Yamaguchi City, Japan, detected 2-101 (average, 23.7) metacercariae per 100 g of trunk muscle from each fish. The trematode was identified as metacercariae of Posthodiplostomum sp. (Strigeidida: Diplostomidae) morphologically and characterized genetically based on the ribosomal RNA gene (rDNA). Phylogenetic trees were constructed on the basis of either the 18S, ITS or 28S region of rDNA to assess the relationship among members of the family Diplostomidae. The addition of genetic data from more diplostomid taxa, particularly Posthodiplostomum cuticola recorded from a variety of freshwater fish in Eurasia, would facilitate the precise identification of the present species.
原产于中国、俄罗斯和韩国的乌鳢，在20世纪20年代首次被引入日本后，目前在日本各地广泛分布。一项对从流经日本山口市的伏木川捕获的10条乌鳢进行的寄生虫学研究发现，每条鱼每100克躯干肌肉中检测到2至101个（平均23.7个）尾蚴。通过形态学鉴定该吸虫为后双盘吸虫属（Strigeidida: Diplostomidae）的尾蚴，并基于核糖体RNA基因（rDNA）进行了基因特征分析。基于rDNA的18S、ITS或28S区域构建系统发育树，以评估双盘吸虫科成员之间的关系。增加更多双盘吸虫类群的遗传数据，特别是从欧亚大陆各种淡水鱼中记录的库氏后双盘吸虫，将有助于准确鉴定当前物种。
