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The Salmon Ledger
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Disease case · Infectious salmon anaemia (ISA)

ISA at Trettevik

Site 17077 · Senja municipality · Troms · Salmar Oppdrett AS. Production area: Andøya til Senja.

  1. Suspected13 Jun 2025Food Safety Authority
  2. Confirmed19 Jun 2025Food Safety Authority
  3. Closednot yetRequires the farm to be emptied and fallowed
Follow the farmAbout the wellboat analysis
  • 475Days since suspicionAs of 01 Oct 2026
  • 0Wellboat visits up to 28 days before, from 0 vesselsCoastal Administration (AIS) · 01 Oct 2026
  • 0Of them from a boat recently at a farm with ISA/PDWithin 14 days before the visit · The Salmon Ledger
  • 0Other farms with active ISA within 10 km at suspicionNorwegian Food Safety Authority · 01 Oct 2026

Wellboat visits before suspicion

The 28 days before the case started (suspected 13 Jun 2025). Each mark is one visit. A triangle means the boat had, in the previous 14 days, been at another farm with active ISA or PD, or in a protection zone. Visits after suspicion are not included.

VisitCame from a farm with ISA/PDPrevious farm unknown (no recorded stop in 14 days)

Sources: Coastal Administration (AIS), Food Safety Authority (cases, and zones via BarentsWatch) · visits derived by The Salmon Ledger · updated 01 Oct 2026

Visits in the 28 days before suspicion

No recorded wellboat visits in the period.