The suspicion arose on the 22 August and the farm was quarantined on the same day.
"The Food Safety Authority announced the decision to slaughter and decontaminate the fish and farm in anelgget and Mainstream began the cull early this week," says Vibeke Elvenes, District Manager at the District Office for West Finnmark.
The site will be fallowed for a period of at least two months," said Ms Elvenes.
The site lies at the Long Fjord in Alta. The nearest neighbour is Eidsnes 8 km away. The is only Mainstream Norway AS with farming activity in this fjord. The nearest farm is 12 km away.