ISA outbreak at Chilean salmon farm – Fishfarmer Magazine

ISA outbreak at Chilean salmon farm19 March, 2014 –

INFECTIOUS salmon anaemia (ISA) has been confirmed in two cages in a salmon farming centre in Chiloe Island belonging to Invertec Pesquera Mar de Chiloe (Invermar).

The outbreak of the HPR7B virus, in two cages in Traiguen 1, was confirmed by Cecilia Solis Fernandez, national director of the Chilean National Fisheries and Aquaculture Service (Sernapesca).

‘A sample taken by Sernapesca last week made it possible that by Friday we had the suspicion of the virus presence,’ she explained.

‘The following day we had inspectors detecting the presence of disease-associated symptoms, and carrying out a second sampling, which today confirmed the presence of ISA.’

As well as making assurances that all measures were being taken to contain the outbreak, Sernapesca also promised to provide regular updates on the progress of the outbreak.

Affecting Atlantic salmon and similar to the inluenza viruses, ISA causes severe anaemia of infected fish, which may develop pale gills and can be seen swimming on the surface desperately gulping for air.

Other fish may have no obvious symptoms but suddenly die. If left unchecked, the disease can sweep through a farm and mortality rates can reach up to 100 per cent.