Low pathogenic avian influenza (poultry),
Canada
Information received on 24/01/2009 from Dr Brian Evans, Chief Food Safety Officer/Chief Veterinary Officer, Office of the President, Canadian Food Inspection Agency, OTTAWA, Canada
Summary
Report type Immediate notification
Date of start of the event 20/01/2009
Date of confirmation of the event 23/01/2009
Report date 24/01/2009
Date submitted to OIE 24/01/2009
Date event resolved 11/03/2009
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2005
Manifestation of disease Clinical disease
Causal agent Low pathogenic avian influenza virus (H5)
Serotype Pending
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (24/01/2009)
Follow-up report No. 1 (31/01/2009)
Follow-up report No. 2 (03/02/2009)
Follow-up report No. 3 (11/02/2009)
Follow-up report No. 4 (06/03/2009)
Follow-up report No. 5 (03/04/2009)
Follow-up report No. 6 (11/06/2009)
New outbreaks (1)
Outbreak 1 (2009-BC-001) Abbotsford, BRITISH COLUMBIA
Date of start of the outbreak 12/01/2009
Outbreak status Resolved (20/02/2009)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 57339 1300 0 57339 0
Affected population A turkey meat type production unit. Turkeys are all kept in the same barn. There are 3 distinct groups of birds. The affected flock is 90 days old (8,755 birds) with a morbidity about 15% and the other groups are 20 days (9,245 birds) and 55 days (9,774 birds). No significant mortality was observed. On the same premises, in another barn, there are three other groups of meat type turkeys: one is 7 days old (10,151 birds), another is 50 days old (9,631 birds) and the last one is 84 days old (9,783 birds). No clinical signs were observed in that barn.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 57339 1300 0 57339 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 2.27% 0.00% 0.00% 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 The premises where the disease was diagnosed is in the Fraser Valley in the province of British Columbia, where an important event of highly pathogenic avian influenza also occurred in 2004. British Columbia is located at the westernmost limit of Canada. Birds from this farm were submitted by the veterinary private practitioner to the Animal Health Centre (AHC - British Columbia Ministry of Agriculture, Food and Fisheries) as a routine submission for a respiratory related problem with no significant mortality. The AHC is a member of the Canadian Avian Influenza Laboratory Network. The Canadian Food Inspection Agency (CFIA) National Center for Foreign Animal Diseases confirmed the diagnosis (conventional PCR H5 positive) on samples initially processed by the AHC. Results of gene sequencing indicate a low path cleavage site (NVPQRETR/GLFGAIA). The sequence is 99% related to another H5 virus (H5N2) from California in 2007. Closest match in Genbank is A/American green-winged teal/California/HKWF609/2007(H5N2), accession number: CY033444 Additional tests are underway. The index premises and all premises within 3 km of this premises have been placed under quarantine. Trace out investigations are underway and all significant contacts will also be quarantined. Surveillance and control activities have started in accordance with the CFIA Notifiable Avian Influenza Hazard Specific Plan. Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2008).
Control measures
Measures applied
  • Screening
  • Quarantine
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • Disinfection / Disinfestation
  • Stamping out
Diagnostic test results
Laboratory name and type Species Test Test date Result
CFIA National Center for Foreign Animal Diseases - Winnipeg (National laboratory) Birds polymerase chain reaction (PCR) 23/01/2009 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations