Highly pathogenic avian influenza,
Canada
Information received on 09/12/2014 from Dr Martine Dubuc, OIE Delegate for Canada, Chief Food Safety Officer Vice-President, Science Branch, Health Ministry, Canadian Food Inspection Agency, Ottawa, Canada
Summary
Report type Follow-up report No. 1
Date of start of the event 30/11/2014
Date of confirmation of the event 01/12/2014
Report date 09/12/2014
Date submitted to OIE 09/12/2014
Date event resolved 25/03/2015
Reason for notification Recurrence of a listed disease
Date of previous occurrence 01/2008
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N2
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (03/12/2014)
Follow-up report No. 1 (09/12/2014)
Follow-up report No. 2 (12/12/2014)
Follow-up report No. 3 (19/12/2014)
Follow-up report No. 4 (08/01/2015)
Follow-up report No. 5 (21/04/2015)
Follow-up report No. 6 (05/06/2015)
New outbreaks (3)
Outbreak 1 (BC-2014-NAI-004) Abbotsford, BRITISH COLUMBIA
Date of start of the outbreak 02/12/2014
Outbreak status Resolved (19/02/2015)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 27200 22 22 27178 0
Affected population BC-2014-NAI-004 Chicken broiler breeder farm. Affected barn holds hens and roosters 41 week old (sudden death). In addition, 7 and 59 week old hens and roosters on the premises with normal mortality rates.
Outbreak 2 (BC-2014-NAI-003) Abbotsford, BRITISH COLUMBIA
Date of start of the outbreak 03/12/2014
Outbreak status Resolved (07/02/2015)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 14900 250 250 14650 0
Affected population BC-2014-NAI-003 Chicken broiler breeder farm. Affected barn holds hens and roosters 37 week old (sudden death). In addition, 7 week old pullets on the premises with normal mortality rate.
Outbreak 3 (BC-2014-NAI-005) Abbotsford, BRITISH COLUMBIA
Date of start of the outbreak 05/12/2014
Outbreak status Resolved (04/02/2015)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 31000 50 50 30950 0
Affected population BC-2014-NAI-005 Meat turkey farm. One barn affected 9 week old birds, high mortality. In addition, 4 and 14 week old birds on premises with normal mortality rates.
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 73100 322 322 72778 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.44% 0.44% 100.00% 100.00%
*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 Testing at the Canadian Food Inspection Agency (CFIA) National Centre for Foreign Animal Disease (NCFAD) on samples from outbreaks number BC-2014-NAI-001 and BC-2014-NAI-002 was performed: RT-PCR and partial sequencing of the H and N gene segments indicates a poly-basic cleavage site in H5 consistent with Highly Pathogenic Avian Influenza Virus and the virus being a H5N2 Avian Influenza Virus with an IVPI of 2.96-2.98. The CFIA has also confirmed H5 avian influenza virus in 3 additional farms (outbreak number BC-2014-NAI-003, BC-2014-NAI-004 and BC-2014-NAI-005) with clinical signs. Farms from outbreak number BC-2014-NAI-001, BC-2014-NAI-002, BC-2014-NAI-003 and BC-2014-NAI-004 have been humanely depopulated. At this point, this event is limited geographically to a portion of the Fraser Valley in the southern fringe of the province of British Columbia. Infected premises were quarantined by the Canadian Food Inspection Agency (CFIA) and a stamping out policy is being implemented, as described in the Notifiable Avian Influenza (NAI) Hazard Specific Plan. The Canadian Notifiable Avian Influenza Surveillance System (CanNAISS) is an ongoing surveillance system built to demonstrate absence of NAI in poultry in Canada. CanNAISS results and epidemiological investigation to date are supporting that there is no evidence of infection outside of the Fraser Valley in British Columbia. On 8 December 2014, the Canadian Food Inspection Agency (CFIA) has established a primary control zone in the area where the disease has been identified. The primary control zone is bordered on the west by the Pacific Ocean, on the south by the United States border, on the north by Highway 16, and on the east by the border between British Columbia and Alberta. Additional information on the zone and the restrictions in place are available at http://www.inspection.gc.ca/an.imals/terrestrial-animals/diseases/reportable/ai/statement-2014-12-08/eng/1418073266291/1418073267337.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Quarantine
  • Stamping out
  • Zoning
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • Disinfection / Disinfestation
Diagnostic test results
Laboratory name and type Species Test Test date Result
National Centre for Foreign Animal Disease, Canadian Food Inspection Agency (National laboratory) Birds intravenous pathogenicity index (IVPI) test 06/12/2014 Positive
National Centre for Foreign Animal Disease, Canadian Food Inspection Agency (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 03/12/2014 Positive
National Centre for Foreign Animal Disease, Canadian Food Inspection Agency (National laboratory) Birds virus isolation 04/12/2014 Positive
National Centre for Foreign Animal Disease, Canadian Food Inspection Agency (National laboratory) Birds virus sequencing 04/12/2014 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations