Infectious haematopoietic necrosis,
Italy
Information received on 11/05/2018 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
Summary
Report type Immediate notification
Date of start of the event 17/04/2018
Date of confirmation of the event 08/05/2018
Report date 11/05/2018
Date submitted to OIE 11/05/2018
Reason for notification Recurrence of a listed disease
Date of previous occurrence 15/10/2015
Manifestation of disease Sub-clinical infection
Causal agent Infectious haematopoietic necrosis virus
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 (NHI_TN_2018_1) Tenno, TRENTO, Trento
Date of start of the outbreak 17/04/2018
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 (scale 0 to 5) 0 (scale 0 to 5) 80000 3 0 0 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 80000 3 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rainbow trout (Oncorhynchus mykiss) (kg) 0.00% 0.00% 0.00% 0.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments The outbreak was ascertained in the framework of the controls for the recognition of indemnity of Infectious haematopoietic necrosis in the farm. No clinical signs have been observed; the outbreak was confirmed solely on the basis of laboratory results.
Control measures
Measures applied
  • Movement control inside the country
  • Zoning
  • Disinfection
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Stamping out
Diagnostic test results
Laboratory name and type Species Test Test date Result
Experimental Zooprophylactic Institute (IZSVe), Padova (National laboratory) Rainbow trout (Oncorhynchus mykiss) pathogen isolation on cell culture 08/05/2018 Positive
Experimental Zooprophylactic Institute (IZSVe), Padova (National laboratory) Rainbow trout (Oncorhynchus mykiss) polymerase chain reaction (PCR) 08/05/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations