HSMI causes chronic slow-mortality outbreaks in seawater-phase salmon. First described in Norway (1999), it has since appeared globally. Currently no effective vaccine or treatment. Managed through biosecurity and selective breeding.
📊 Key Facts
Causative Agent
Piscine orthoreovirus (PRV)
Peak Mortality
20%
Onset to Peak
4-8 weeks
Geographic Range
Norway, Scotland, Chile, British Columbia
Transmission Routes
Waterborne, vertical transmission
Primary Host
Atlantic salmon
Treatment
✗ None
Vaccine
✗ None / Experimental
💊 Treatment
⚠️ No universally approved treatment is currently available. The information below covers supportive care and experimental approaches.
No specific treatment available; supportive management.