Marine Harvest continues to reduce their IPN loss

Marine Harvest Norway AS has used the PatoGen IPN virus surveillance model in all their freshwater facilities and production systems since the autumn of 2010.

Article from Pathos #1-2013

 

“Testing all broodstock individuals means that new IPN viruses are not introduced into the hatcheries."

Lisbeth Løvmo Martinsen - Fish Health Biologist Dept. Freshwater, Central Norway, Marine Harvest Norway

The situation with IPNV in Marine Harvest Norway AS has vastly improved. We still occasionally detect one or two cases in some facilities, but most often it is so little that we don't get outbreaks in freshwater. Genotyping the viruses has been a great help in finding the routes of infection, and focusing on washing and hygiene in the facilities means that we have almost completely eradicated house strains. IPNV testing of all broodstock individuals means that new IPN viruses are not introduced into the facilities. The project has generated systematic organisation of IPNV findings and mapping that have been very positive for our production.

“Since the start of the project, the results so far show a clear decrease in the number of outbreaks and losses due to IPN."

Frode Vik-Mo, Fish Health Manager, Northern region, Marine Harvest Norway AS

In the Northern region, IPN has for many years been the biggest reason for post-release loss of fish. Since starting the project, the results so far show a clear decrease in the number of outbreaks and losses due to IPN. A biological and economic production needs predictability and control of risk factors. Knowledge of smolt IPNV status is for us an important management tool to reduce the post-release loss. So far this year, we in the Northern region have not detected IPNV at any of the freshwater farms nor on the spring smolt that was released. We therefore have high expectations of the project in the future.

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