Comparative Molecular Characterization of Novel and Known Piscine Toti-Like Viruses.

Totiviridae is a virus family well known to infect uni-cellular organisms like fungi and protozoa. In more recent years, viruses characterized as toti-like viruses, have been found in primarily arthropods, but also a couple in planarians and piscine species. These toti-like viruses share phylogenetic similarities to totiviruses; however, their genomes also includes additional coding sequences in either 5' or 3' ends expected to relate to more advanced infection mechanisms in more advanced hosts.

Pasteurella spp. Infections in Atlantic salmon and lumpsucker.

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.).

Multigene Expression Assay for Assessment of the Immune Status of Atlantic Salmon.

We report the development of a multigene gene expression assay on the BioMark HD platform for the evaluation of immune competence (ImCom) in farmed Atlantic salmon. The first version of the assay included 92 genes selected on the basis of transcriptome analyses in 54 trials that challenged the immune system; annotations were taken into account to represent the key pathways of innate and adaptive immunity. ImCom was tested on samples collected from seven independent projects.

Indications for a vertical transmission pathway of piscine myocarditis virus in Atlantic salmon (Salmo salar L.).

Losses due to cardiomyopathy syndrome (CMS) keep increasing in salmon-producing countries in the North-Atlantic. Recently, Piscine myocarditis virus (PMCV) has been detected in post-smolts shortly after sea-transfer, indicating a possible carry-over from the hatcheries. In addition, there are reports of prevalences of PMCV as high as 70%-90% in certain groups of broodfish, and a recent outbreak of CMS in the Faroe Islands has been linked to the importation of eggs from a CMS-endemic area.

Monitoring infection with Piscine myocarditis virus and development of cardiomyopathy syndrome in farmed Atlantic salmon (Salmo salar L.) in Norway.

An epidemiological study was carried out in Norway in 2015-2018, investigating the development of infection with Piscine myocarditis virus (PMCV) and development of cardiomyopathy syndrome (CMS) in farmed Atlantic salmon. Cohorts from 12 sites were followed and sampled every month or every other month from sea transfer to slaughter. PMCV was detected at all sites and in all sampled cages, and fish in six sites developed clinical CMS.