Low pathogenic avian influenza (poultry),
Canada
Information received on 25/11/2010 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 17/11/2010
Date of confirmation of the event 23/11/2010
Report date 24/11/2010
Date submitted to OIE 25/11/2010
Date event resolved 22/02/2011
Reason for notification Recurrence of a listed disease
Date of previous occurrence 11/03/2009
Manifestation of disease Clinical disease
Causal agent Low 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 (24/11/2010)
Follow-up report No. 1 (01/12/2010)
Follow-up report No. 2 (10/12/2010)
Follow-up report No. 3 (23/12/2010)
Follow-up report No. 4 (11/02/2011)
Follow-up report No. 5 (02/05/2011)
New outbreaks (1)
Outbreak 1 (NAI-2010-MB-001) Rockwood municipality, MANITOBA
Date of start of the outbreak 17/11/2010
Outbreak status Resolved (22/02/2011)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 8200 0 8200 0
Affected population Turkey breeders farm, with four barns on site. Barn 1 is empty, barn 2 contains 600 toms (approx.), barn 3 contains 3,800 hens (approx.) and barn 4 contains 3,800 hens (approx.). The hens in both barn 3 and 4 are 44 weeks old and were lethargic with a 45% decrease in egg production but the egg production has improved since the start of the event. No respiratory disease was observed. The mortality in the flock has not increased. Note: We assume that many birds were affected because a 45% decrease in egg production was observed; however, the exact number of infected birds is unknown.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 8200 ** 0 8200 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** 0.00% ** 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments This is the first outbreak of Notifiable Avian Influenza (NAI) detected in the province of Manitoba. The farm has been quarantined by the Canadian Food Inspection Agency (CFIA) and investigation will be conducted in compliance with the Canada's Notifiable Avian Influenza Hazard Specific Plan. A stamping out policy will be applied. Preliminary results from the National Center for Foreign Animal Diseases in Winnipeg indicate the presence of a H5N2 subtype avian influenza virus (PCR). Sequence analysis of the PCR products indicates that the cleavage site is consistent with low pathogenic avian influenza virus H5. Closest matches (99% identity) in Genbank are to North American H5N2 viruses from wild birds. Virus isolation is underway and additional testing is to come, including the intravenous pathogenicity index test. NAI surveillance has been in place in domestic poultry in Canada for many years and this outbreak is limited to the province of Manitoba. 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 (2010).
Control measures
Measures applied
  • Movement control inside the country
  • 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
Manitoba Agriculture, Food and Rural Initiatives Veterinary Diagnostic Services (Local laboratory) Birds polymerase chain reaction (PCR) 23/11/2010 Positive
CFIA - National Center for Foreign Animal Diseases (National laboratory) Birds nucleotide sequencing 24/11/2010 Positive
CFIA - National Center for Foreign Animal Diseases (National laboratory) Birds real-time PCR 24/11/2010 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations