The epidemiological and economic effects from systematic depopulation of Norwegian marine salmon farms infected with pancreas disease virus

Pettersen, J.M.; Brynildsrud, Ola Brønstad; Huseby, Ragnar Bang; Rich, Karl M.; Aunsmo, Arnfinn; Bang, Bongjun; Aldrin, Magne

doi:10.1016/j.prevetmed.2016.09.001

Cited by 11 publications

(3 citation statements)

References 33 publications

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“…It is thus imperative to gain sufficient knowledge to be able to implement effective industry-level control measures. In this context, it is noteworthy that animal health economics studies have increasingly been applied to estimate the economic impact of disease and the value of control measures (Aunsmo, Valle, Sandberg, Midtlyng, & Bruheim, 2010;Pettersen, Osmundsen, Aunsmo, Mardones, & Rich, 2015;Pettersen et al, 2016). Such models could be valuable tools in future management of CMS in farmed salmon.…”

Section: Biosecurity Measuresmentioning

confidence: 99%

Cardiomyopathy syndrome in Atlantic salmon Salmo salar L.: A review of the current state of knowledge

Garseth

Fritsvold

Svendsen

et al. 2017

Journal of Fish Diseases

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and 2011 were significant discoveries that gave new impetus to the CMS research.In Norway, CMS usually causes mortality in large salmon in ongrowing and broodfish farms, resulting in reduced fish welfare, significant management-related challenges and substantial economic losses. The disease thus has a significant impact on the Atlantic salmon farming industry. There is a need to gain further basic knowledge about the virus, the disease and its epidemiology, but also applied knowledge from the industry to enable the generation and implementation of effective prevention and control measures. This review summarizes the currently available, scientific information on CMS and PMCV with special focus on epidemiology and factors influencing the development of CMS.

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Section: Biosecurity Measuresmentioning

confidence: 99%

Cardiomyopathy syndrome in Atlantic salmon Salmo salar L.: A review of the current state of knowledge

Garseth

Fritsvold

Svendsen

et al. 2017

Journal of Fish Diseases

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“…In this study, a scenario where all farms were stamped out within 30 days of virus detection reduced the expected aggregated number of PD outbreaks from 162 to six. A scenario where all farms were stamped out only after a clinical outbreak led to a reduction from 162 to 103 thus supporting the efficacy of immediate measures (Pettersen et al, 2016;Bang Jensen et al, 2021).…”

Section: Effectivenessmentioning

confidence: 96%

Assessment of listing and categorisation of animal diseases within the framework of the Animal Health Law (Regulation (EU)2016/429): Infection with salmonid alphavirus (SAV)

Nielsen,

Alvarez,

Calistri

et al. 2023

EFS2

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Infection with salmonid alphavirus (SAV) was assessed according to the criteria of the Animal Health Law (AHL), in particular the criteria of Article 7 on disease profile and impacts, Article 5 on its eligibility to be listed, Annex IV for its categorisation according to disease prevention and control rules as laid out in Article 9 and Article 8 for listing animal species related to infection with SAV. The assessment was performed following the ad hoc method on data collection and assessment developed by AHAW Panel and already published. The outcome reported is the median of the probability ranges provided by the experts, which indicates whether each criterion is fulfilled (lower bound ≥ 66%) or not (upper bound ≤ 33%), or whether there is uncertainty about fulfilment. Reasoning points are reported for criteria with an uncertain outcome. According to the assessment, it was uncertain whether infection with salmonid alphavirus can be considered eligible to be listed for Union intervention according to Article 5 of the AHL (50-80% probability). According to the criteria in Annex IV, for the purpose of categorisation related to the level of prevention and control as in Article 9 of the AHL, the AHAW Panel concluded that infection with salmonid alphavirus does not meet the criteria in Section 1 (Category A; 5-10% probability of meeting the criteria) and it is uncertain whether it meets the criteria in Sections 2, 3, 4 and 5 (Categories B, C, D and E; 50-90%, probability of meeting the criteria). The animal species to be listed for infection with SAV according to Article 8 criteria are provided.

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“…The exact origin of the introduction remains unresolved; it may be virus that survived, that is, stayed infectious from the preceding production cycle, be facilitated through water current, or involve the spread of the virus through anthropogenic activity. An important biosecurity measure is the mandatory fallowing of sea sites between production cycles, a practice implemented in Norwegian aquaculture (Forskrift om drift av akvakulturanlegg, 2008; Pettersen et al, 2016). A 2-month fallowing period is required by governmental regulations, but commonly Atlantic salmon producers with sites within a geographically defined zone have implemented voluntary synchronized fallowing.…”

mentioning

confidence: 99%

Introduction and temporospatial tracing of piscine orthoreovirus‐1 (PRV‐1) in Norwegian farmed Atlantic salmon (Salmo salar) after local fallowing

Vatne,

Wessel,

Trengereid

et al. 2024

Journal of Fish Diseases

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Piscine orthoreovirus‐1 (PRV‐1) is a prevalent agent in Atlantic salmon (Salmo salar) and the causative agent of heart and skeletal muscle inflammation (HSMI), an important disease in farmed Atlantic salmon. Investigations into the introduction and dissemination routes of PRV‐1 in a field setting have been limited. This study aimed to better understand PRV‐1 infections and HSMI‐associated mortality under field conditions. We tracked introduction and spread of PRV‐1 over one production cycle in a geographically isolated region in Norwegian aquaculture. From five sites, a total of 32 virus isolates were sequenced and genogrouped. The results indicated multiple introductions of PRV‐1 to the area, but also revealed a high level of genetic homogeneity among the virus variants. The variants differed from that of the previous production cycle at two out of three sites investigated, suggesting that synchronized fallowing can be a useful tool for preventing dissemination of PRV‐1 between generations of fish. Exposure to PRV‐1 at the freshwater stage was identified as a potential source of introduction. A low level of HSMI‐associated mortality was observed at all sites, with the onset of mortality showing some variation across PRV‐1 genogroups. However, the study highlighted the complexity of associating viral genogroups with mortality in a field setting. Overall, this study contributes valuable insights into PRV‐1 dynamics in a real‐world aquaculture setting, offering potential strategies for disease management and prevention.

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The epidemiological and economic effects from systematic depopulation of Norwegian marine salmon farms infected with pancreas disease virus

Cited by 11 publications

References 33 publications

Cardiomyopathy syndrome in Atlantic salmon Salmo salar L.: A review of the current state of knowledge

Cardiomyopathy syndrome in Atlantic salmon Salmo salar L.: A review of the current state of knowledge

Assessment of listing and categorisation of animal diseases within the framework of the Animal Health Law (Regulation (EU)2016/429): Infection with salmonid alphavirus (SAV)

Introduction and temporospatial tracing of piscine orthoreovirus‐1 (PRV‐1) in Norwegian farmed Atlantic salmon (Salmo salar) after local fallowing

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