Viral haemorrhagic septicaemia,
Information received on 02/12/2019 from Dr Silvio Borrello, Chief Veterinary Officer, Food Safety and Collegial Bodies for Health Protection, Ministère de la Santé, Department for Veterinary Public Health, Rome, Italy
Report type Immediate notification
Date of start of the event 18/11/2019
Date of confirmation of the event 21/11/2019
Report date 02/12/2019
Date submitted to OIE 02/12/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 13/12/2018
Manifestation of disease Clinical disease
Causal agent Viral haemorrhagic septicaemia virus
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to the whole country
New outbreaks (1)
Outbreak 1 (VHS_2019_1_TN) Riva del Garda, TRENTO, Trento
Date of start of the outbreak 18/11/2019
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow Trout (Oncorhynchus mykiss.) (kg) 0.53 % 0.53 % 170000 900 900
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow Trout (Oncorhynchus mykiss.) (kg) 170000 900 900
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rainbow Trout (Oncorhynchus mykiss.) (kg) 0.53% 0.53% 100.00% **
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments The farm was being controlled within the framework of the eradication plan for viral haemorrhagic septicaemia (VHS). The last control on samples taken gave a positive result for VHS.
Control measures
Measures applied
  • Movement control inside the country
  • Official disposal of carcasses, by-products and waste
  • Killing for commercial use or own use
  • Disinfection
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Experimental zooprophylactic institute Venezie - Padova (National laboratory) Rainbow trout (Oncorhynchus mykiss) virus neutralisation test (VNT) 21/11/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations