Institute of Marine Research, Bergen, Norway.
Department of Biological Sciences, University of Bergen, Bergen, Norway.
J Fish Dis. 2021 Aug;44(8):1201-1214. doi: 10.1111/jfd.13381. Epub 2021 May 7.
The use of cleaner fish as a delousing method in Norwegian salmonid aquaculture has increased tremendously over the last few years. This has led to the emergence of a new large industry of farming lumpsuckers (Cyclopterus lumpus L.). The use of lumpsuckers as cleaner fish has, however, not been problem-free. Bacterial diseases cause high mortalities with pasteurellosis as one of the major emerging diseases. During the past few years, outbreaks of pasteurellosis in farmed Atlantic salmon (Salmo salar L.) have become more frequent. This has led to an increasing concern that this disease will become common in salmon farming as well. The purpose of this study was to investigate the susceptibility of Atlantic salmon to Pasteurella spp. infection and the possibility of lumpsuckers transmitting pasteurellosis to Atlantic salmon. Atlantic salmon were experimentally challenged, either by bath or by cohabitation with challenged lumpsuckers, using two different strains of Pasteurella spp. (originating from lumpsucker and Atlantic salmon, respectively). No clinical signs of pasteurellosis were observed on any of the Atlantic salmon. The lumpsuckers were, however, equally susceptible to both isolates. In addition, clear differences in histopathological changes were observed between individuals challenged with the two isolates.
近年来，挪威鲑鱼养殖中使用清洁鱼（濑鱼）来除虱的方法得到了极大的推广。这导致了一个养殖圆鳍鱼（Cyclopterus lumpus L.）的新兴大型产业的出现。然而，使用圆鳍鱼作为清洁鱼并非没有问题。细菌性疾病导致高死亡率，其中巴氏杆菌病是主要的新兴疾病之一。在过去几年中，养殖大西洋鲑鱼（Salmo salar L.）中巴氏杆菌病的爆发变得更加频繁。这导致人们越来越担心这种疾病也将在鲑鱼养殖中变得普遍。本研究旨在调查大西洋鲑鱼对巴斯德氏菌属感染的易感性，以及圆鳍鱼将巴氏杆菌病传播给大西洋鲑鱼的可能性。使用来自圆鳍鱼和大西洋鲑鱼的两种不同巴氏杆菌属（Pasteurella spp.）菌株，通过浴或与受感染的圆鳍鱼共同饲养，对大西洋鲑鱼进行了实验性挑战。在任何一条大西洋鲑鱼身上都没有观察到巴氏杆菌病的临床症状。然而，两种分离株对圆鳍鱼的易感性相同。此外，用两种分离株感染的个体之间观察到明显的组织病理学变化差异。
