鲈鱼的鳃寄生车轮虫病及扫描电镜观察

报道鲈鱼的鳃寄生车轮虫病及病理组织的扫描电镜观察。病原鉴定为 :直钩车轮虫、杜氏车轮虫、日本车轮虫、劳牧小车轮虫及简单两分虫 5种车轮虫科纤毛虫 ,其中数量上占优势的为直钩车轮虫。扫描电镜观察结果表明 ,鳃寄生车轮虫可对宿主的上皮组织产生明显的机械性损伤并造成鳃丝粘液分泌增多及炎症反应。文中就海水养殖鱼类及野生鱼类由车轮虫寄生造成的危害及防治途径做了探讨。

Scanning Electron Microscopic Observations on the Histopathology of Trichodiniasis of the Mariculture Fish, Lateolabrax japonicus

Trichodiniasis of the marine fish, Lateolabrax japonicus (Cuvier in Cuvier and Valenciennes) in the mariculture pond off the coast of Qingdao caused by trichodinid gill parasites was surveyed. 5 species were recognized as pathogens: Trichodina rectuncinata, T. domerguei, T. japonica , Trichodinella lomi and Dipartiella simplex , of which Trichodina rectuncinata was a dominant form. Histopathology of the gills of Lateolabrax japonicus infested by trichodinids was observed by scanning electron microscopy. It was revealed that due to the attachment of trichodinids on the surface of the gills of the host, serious physical damage could be caused to the host tissue. The pathogeny, extent of harmfulness and control approach are discussed.