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Aquaculture Europe 2013: Vaccination in Biosecurity Programmes

14 August 2013, at 1:00am

NORWAY - In aquatic animals, vaccination is a biosecurity measure. As segregation and cleaning is harder in fish farms, it is important that fish are treated before disease is present in order to prevent the risk and spread of disease, writes Lucy Towers, TheFishSite Editor, from Aquaculture Europe, Trondheim, Norway.

Vaccination can be a useful tool, said Roar Gudding during his presentation at Aquaculture Europe 2013. One way in which fish can be successfully protected is through herd immunity.

This technique allows all the fish in a stock to be protected through vaccinating only a proportion of the stock.

In order for all fish to be protected, the amount vaccinated needs to be greater than the number not vaccinated.

Giving an example, Mr Gudding showed how in Norway the application of a vaccine for furunculosis has led to decreased mortality. Each year after application, the number of mortalities decreased and, by the third year, there were no mortalities reported.

In this way, vaccines can be used as a tool by authorities to prevent the spread or occurrence of disease in an area.

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