Infectious hypodermal and haematopoietic necrosis,
Canada
Information received on 12/06/2020 from Dr Jaspinder Komal, Deputy Chief Veterinary Officer, Canadian Food Inspection Agency, Canadian Food Inspection Agency, Ottawa, Canada
Summary
Report type Follow-up report No. 2 (Final report)
Date of start of the event 14/06/2019
Date of confirmation of the event 14/08/2019
Report date 12/06/2020
Date submitted to OIE 12/06/2020
Date event resolved 12/06/2020
Reason for notification First occurrence of a listed disease in the country
Causal agent Infectious hypodermal and haematopoietic necrosis virus
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (16/08/2019)
Follow-up report No. 1 (23/08/2019)
Follow-up report No. 2 (12/06/2020)
Outbreaks There are no new outbreaks in this report
Epidemiology
Source of the outbreak(s) or origin of infection
  • Introduction of new live animals
Epidemiological comments All the four clusters were epidemiologically-linked due to a common source of imported shrimp post-larvae. The four infected premises were put under official quarantine. One of the cluster (Peterborough site) is a contained research facility. The other 3 sites are land-based closed-contained recirculation commercial production operations with no effluent discharge. All the animals on these three production premises have been destroyed. There are no known IHHNV wild susceptible species in natural environment in Canada.
Control measures
Measures applied
  • Movement control inside the country
  • Traceability
  • Quarantine
  • Killing for commercial use or own use
  • Disinfection
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Gulf Biocontainment Unit (National laboratory) Whiteleg shrimp (Litopenaeus vannamei) histopathological examination 14/08/2019 Inconclusive
Gulf Biocontainment Unit (National laboratory) Whiteleg shrimp (Litopenaeus vannamei) in situ hybridisation (ISH) 14/08/2019 Positive
Gulf Fisheries Centre (National laboratory) Whiteleg shrimp (Litopenaeus vannamei) gene sequencing 08/08/2019 Positive
Gulf Fisheries Centre (National laboratory) Whiteleg shrimp (Litopenaeus vannamei) polymerase chain reaction (PCR) 08/08/2019 Positive
Pacific Biological Station (National laboratory) Whiteleg shrimp (Litopenaeus vannamei) real-time PCR 26/07/2019 Positive
Future Reporting
The event is resolved. No more reports will be submitted.