Frisch K, Småge S B, Brevik Ø J, Duesund H, Nylund A
Cermaq Group AS, Oslo, Norway.
Fish Disease Research Group, Department of Biology, University of Bergen, Bergen, Norway.
J Fish Dis. 2018 Jan;41(1):131-137. doi: 10.1111/jfd.12687. Epub 2017 Jul 26.
Mouthrot infections (bacterial stomatitis) have a significant impact on the Atlantic salmon aquaculture industry in Western Canada due to economic losses and fish welfare. Bacteria isolated from lesions in the field have been identified as Tenacibaculum maritimum. Mouthrot is different to classical tenacibaculosis, which is most commonly associated with ulcerative lesions, frayed fins and tail rot. The marine fish pathogen T. maritimum is found worldwide; however, in Western Canada, the knowledge of the genetic profile of T. maritimum is limited. This study looked at increasing this knowledge by genotyping T. maritimum isolates collected from Atlantic salmon from farms in Western Canada. These genotypes were compared to other species of the genus Tenacibaculum, as well as other known sequence types within the species. The Western Canadian isolates belong to two new sequence types within the T. maritimum species. Phylogenetic analysis shows that the isolates form a distinct branch together with T. maritimum NCIMB 2154 separate from other Tenacibaculum type strains, and they are most closely related to strains from Norway and Chile.
由于经济损失和鱼类健康问题，口腐病感染（细菌性口炎）对加拿大西部的大西洋鲑鱼养殖业产生了重大影响。从野外病灶分离出的细菌已被鉴定为海栖黄杆菌。口腐病与典型的黄杆菌病不同，后者最常与溃疡性病灶、鳍条磨损和尾腐病有关。海洋鱼类病原体海栖黄杆菌在全球范围内都有发现；然而，在加拿大西部，关于海栖黄杆菌基因特征的了解有限。本研究旨在通过对从加拿大西部养殖场的大西洋鲑鱼中分离出的海栖黄杆菌进行基因分型来增加这方面的知识。将这些基因型与黄杆菌属的其他物种以及该物种内其他已知的序列类型进行比较。加拿大西部的分离株属于海栖黄杆菌物种内的两个新序列类型。系统发育分析表明，这些分离株与海栖黄杆菌NCIMB 2154一起形成一个独特的分支，与其他黄杆菌属模式菌株分开，并且它们与来自挪威和智利的菌株关系最为密切。
