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Responses to Moritella viscosa in skin and spleen of Atlantic salmon

ABSTRACT: Responses to Moritella viscosa in skin and spleen of Atlantic salmon

PROVIDER: PRJNA720609 | ENA |

REPOSITORIES: ENA

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Responses to Moritella viscosa in skin and spleen of Atlantic salmon

Project description:Bacterial pathogen Moritella viscosa, the causative agent of winter ulcer, causes heavy losses in Atlantic salmon aquaculture. The study compared responses in salmon reared under normal condition (G100) and fish exposed to hypoxia - 60% saturation of dissolved oxygen - at early life (G60). G60 showed lower survival after challenge. Analyses were performed in the most affected tissues: skin and spleen

2021-04-09 | GSE171693 | GEO

Differential expression of miRNAs and mRNAs in Moritella viscosa challenge Atlantic salmon

Project description:Moritella viscosa is a bacterial pathogen causing winter-ulcer disease in Atlantic salmon. The lesions on affected fish lead to increased mortality, decreased fish welfare, and inferior meat quality in farmed salmon. MicroRNAs (miRNAs) are small non-coding RNAs involved in post-transcriptional regulation by guiding the miRNA induced silencing complex to specific mRNA transcripts (target genes). The goal of this study was to identify miRNAs responding to Moritella viscosa in salmon by investigating miRNA expression in head-kidney and the muscle/skin from lesion sites caused by the pathogen. Protein coding gene expression was investigated by microarray analysis in the same materials.

2022-08-14 | GSE211004 | GEO

Responses of Atlantic salmon to vaccination and challenge with salmon alphavirus (SAV) and Moritella viscosa

Project description:Salmon alphavirus (SAV) and Moritella viscosa causing respectively pancreatic disease and winter ulcer are among the most important pathogens threatening Atlantic salmon aquaculture. Fish is protected by vaccination with different rate of success. Here, responses to vaccination were assessed followed with pathogen challenges of vaccinated salmon and saline injected control.

2021-04-23 | GSE173130 | GEO

Significance of zinc on skin molecular signatures in Atlantic salmon with Winter ulcer disease

Project description:Vaccinated seawater adapted Atlantic salmon (average weight ~340 g) fed with variable levels of zinc were infected with Moritella viscosa at VESO Vikan. Early responses in skin to infection were investigated 4 days post challenge. Effect of chronic ulceration was investigated 35 days post challenge.

2021-04-09 | GSE171738 | GEO

Atlantic salmon scale explants in bacteria-host interaction studies: in vitro challenge model.

Project description:Atlantic salmon scale explants is a promising model for bacterial challenges. Exposure to pathogens (Moritella viscosa and Tenacibaculum finnmarkense) and commensal bacteria consistently upregulated a suite of immune genes in a dose response manner. This panel includes chemokines, cytokines, genes involved in eicosanoid metabolism, and both humoral and cellular effectors. The prevalence of genes related to signaling and communication suggests that salmon scales function as sentinels, mobilizing immune responses upon encountering bacteria. While common immune responses were evident across all trials, scales also revealed differences between bacterial species. Combining commensal bacteria with M. viscosa enhanced responses to pathogens, and differences were observed between M. viscosa and T. finnmarkense. The effects of commensal bacteria varied in magnitude. Exposed cells showed changes in morphology and increased iNOS expression.

2025-03-30 | GSE292873 | GEO

Moritella viscosa

Project description:Moritella viscosa overview

| PRJNA1030455 | ENA

Differential expression of miRNAs and mRNAs in Moritella viscosa challenge Atlantic salmon

Project description:Differential expression of miRNAs and mRNAs in Moritella viscosa challenge Atlantic salmon

| PRJNA868593 | ENA

Responses of Atlantic salmon to vaccination and challenge with salmon alphavirus (SAV) and Moritella viscosa

Project description:Responses of Atlantic salmon to vaccination and challenge with salmon alphavirus (SAV) and Moritella viscosa

| PRJNA723861 | ENA

Co-cultivation and transcriptome sequencing of two co-existing fish pathogens Moritella viscosa and Aliivibrio wodanis.

Project description:Aliivibrio wodanis and Moritella viscosa have often been isolated together from fish with winter ulcer. Little is known about the interaction between the two bacterial species and how the presence of one bacterial species affects the behaviour of the other. The impact on bacterial growth in co-culture was investigated in vitro, and the presence of A. wodanis has a strong inhibitorial effect on M. viscosa. Further, we have sequenced the complete genomes of these two marine Gram-negative species, and have performed transcriptome analysis of the bacterial gene expression levels from in vivo samples. Using bacterial implants in the fish abdomen, we demonstrate that the presence of A. wodanis is altering the gene expression levels of M. viscosa compared to when the bacteria are implanted separately. The impeding effect on growth and the change in the global gene expression pattern of M. viscosa when the two pathogens co-exists is discussed in this paper.

2014-11-30 | E-MTAB-2851 | biostudies-arrayexpress

Moritella viscosa strain:J311

Project description:Moritella viscosa strain:J311 Genome sequencing

| PRJNA1249531 | ENA