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Highly pathogenic avian influenza,
Canada
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[TD="class: topbigtabletitle27"]Information received on 07/02/2015 from Dr Martine Dubuc, OIE Delegate for Canada, Chief Food Safety Officer Vice-President, Science Branch, Health Ministry, Canadian Food Inspection Agency, Ottawa, Canada[/TD]
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Summary
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[TD="class: filtrer_th, width: 10%"]Report type[/TD]
[TD="width: 30%"]Immediate notification[/TD]
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[TD="class: filtrer_th, width: 10%"]Date of start of the event[/TD]
[TD="width: 30%"]02/02/2015[/TD]
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[TD="class: filtrer_th, width: 10%"]Date of pre-confirmation of the event[/TD]
[TD="width: 30%"]02/02/2015[/TD]
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[TD="class: filtrer_th, width: 10%"]Report date[/TD]
[TD="width: 30%"]06/02/2015[/TD]
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[TD="class: filtrer_th, width: 10%"]Date submitted to OIE[/TD]
[TD="width: 30%"]07/02/2015[/TD]
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[TD="class: filtrer_th, width: 10%"]Reason for notification[/TD]
[TD="width: 30%"]New strain of a listed disease[/TD]
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[TD="class: filtrer_th, width: 10%"]Manifestation of disease[/TD]
[TD="width: 30%"]Clinical disease[/TD]
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[TD="class: filtrer_th, width: 10%"]Causal agent[/TD]
[TD="width: 30%"]Highly pathogenic avian influenza virus[/TD]
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[TD="class: filtrer_th, width: 10%"]Serotype[/TD]
[TD="width: 30%"]H5N1[/TD]
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[TD="class: filtrer_th, width: 10%"]Nature of diagnosis[/TD]
[TD="width: 30%"]Laboratory (advanced)[/TD]
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[TD="class: filtrer_th, width: 10%"]This event pertains to[/TD]
[TD="width: 30%"]a defined zone within the country[/TD]
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New outbreaks (1)
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[TD="class: filtrer_th ta_left, align: left"]Outbreak 1 (BC-2015-NAI-NC2)[/TD]
[TD="class: filtrer_th ta_left"]Chilliwack, BRITISH COLUMBIA[/TD]
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[TD="class: filtrer_th ta_left"]Date of start of the outbreak[/TD]
[TD]02/02/2015[/TD]
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[TD="class: filtrer_th ta_left"]Outbreak status[/TD]
[TD]Continuing (or date resolved not provided)[/TD]
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[TD="class: filtrer_th ta_left"]Epidemiological unit[/TD]
[TD]Backyard[/TD]
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[TD="class: filtrer_th ta_left"]Affected animals[/TD]
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[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Susceptible[/TD]
[TD="class: filtrer_th ta_center last"]Cases[/TD]
[TD="class: filtrer_th ta_center last"]Deaths[/TD]
[TD="class: filtrer_th ta_center last"]Destroyed[/TD]
[TD="class: filtrer_th ta_center last"]Slaughtered[/TD]
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[TD]Birds[/TD]
[TD="class: ta_right"]94[/TD]
[TD="class: ta_right"]94[/TD]
[TD="class: ta_right"]81[/TD]
[TD="class: ta_right"]13[/TD]
[TD="class: ta_right"]0[/TD]
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[TD="class: filtrer_th ta_left"]Affected population[/TD]
[TD]BC-2015-NAI-NC2 Non-commercial semi-confinement chicken laying hens.[/TD]
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[TD="class: filtrer_th ta_left, align: left"]Summary of outbreaks[/TD]
[TD="class: filtrer_th ta_left"]Total outbreaks: 1[/TD]
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[TD="class: filtrer_th ta_left"]Total animals affected[/TD]
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[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Susceptible[/TD]
[TD="class: filtrer_th ta_center last"]Cases[/TD]
[TD="class: filtrer_th ta_center last"]Deaths[/TD]
[TD="class: filtrer_th ta_center last"]Destroyed[/TD]
[TD="class: filtrer_th ta_center last"]Slaughtered[/TD]
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[TD]Birds[/TD]
[TD="class: ta_right"]94[/TD]
[TD="class: ta_right"]94[/TD]
[TD="class: ta_right"]81[/TD]
[TD="class: ta_right"]13[/TD]
[TD="class: ta_right"]0[/TD]
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[TD="class: filtrer_th ta_left"]Outbreak statistics[/TD]
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[TD="class: filtrer_th ta_center last"]Species[/TD]
[TD="class: filtrer_th ta_center last"]Apparent morbidity rate[/TD]
[TD="class: filtrer_th ta_center last"]Apparent mortality rate[/TD]
[TD="class: filtrer_th ta_center last"]Apparent case fatality rate[/TD]
[TD="class: filtrer_th ta_center last"]Proportion susceptible animals lost*[/TD]
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[TD]Birds[/TD]
[TD="class: ta_right"]100.00%[/TD]
[TD="class: ta_right"]86.17%[/TD]
[TD="class: ta_right"]86.17%[/TD]
[TD="class: ta_right"]100.00%[/TD]
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[TD="class: filtrer_th ta_left, colspan: 2"]*Removed from the susceptible population through death, destruction and/or slaughter[/TD]
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Epidemiology
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[TD="class: filtrer_th ta_left"]Source of the outbreak(s) or origin of infection[/TD]
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- Unknown or inconclusive
- Contact with wild species
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[TD="class: filtrer_th ta_left"]Epidemiological comments[/TD]
[TD]This new outbreak was detected in a backyard poultry flock in the Avian Influenza Primary Control Zone (PCZ) in the province of British Columbia (BC), in the same area as the previous outbreaks of HPAI H5N2 reported in December 2014. All susceptible animals on site were humanely destroyed. The National Centre for Foreign Animal Disease (CFIA - Winnipeg) reported NAI H5 RRT-PCR positive results on 4 February 2015 and partial sequencing of H5 and N1 segments on 5 February. The virus involved is a HPAI H5N1 virus with the H5 gene segment derived from the Eurasian lineage, and N1 derived from North American lineage based on partial sequence. The H5 gene segment is very similar to the reassortant H5N2 in BC and the H5 in the H5N1 reassortant virus detected in a wild green-winged teal just south of the border in Washington State, USA. In addition, the N1 gene segment is very similar to North American wild bird viruses and nearly identical, over the very small fragment sequenced this far, to the N1 in the H5N1 virus detected in a green-winged teal mentioned above. Based on the limited partial sequence of the H5 and N1 gene segments obtained this far, it appears very likely that this is the same or a very similar virus to the recent reassortant H5N1 virus in Washington State but more sequencing will be needed to make a final conclusion. This virus has NOT been reported in any commercial poultry flock in Canada. It is important to note this HPAI H5N1 virus is different from the strain circulating in Asia. It is a reassortant virus with the N1 from a North American wild bird virus. The Canadian Food Inspection Agency (CFIA) continues to monitor the situation and implement strict movement restrictions in the PCZ. Ongoing surveillance is in place in all of Canada. All provinces, with the exception of the PCZ in British Columbia, remain free of Notifiable Avian Influenza in poultry.[/TD]
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Control measures
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[TD="class: filtrer_th ta_left"]Measures applied[/TD]
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- Stamping out
- Quarantine
- Movement control inside the country
- Screening
- Zoning
- Disinfection of infected premises/establishment(s)
- Vaccination prohibited
- No treatment of affected animals
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[TD="class: filtrer_th ta_left"]Measures to be applied[/TD]
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Diagnostic test results
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[TD="class: filtrer_th ta_left"]Laboratory name and type[/TD]
[TD="class: filtrer_th ta_left"]Species[/TD]
[TD="class: filtrer_th ta_left"]Test[/TD]
[TD="class: filtrer_th ta_left"]Test date[/TD]
[TD="class: filtrer_th ta_left last"]Result[/TD]
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[TD="class: filtrer"]Animal Health Centre, British Columbia Ministry of Agriculture (Local laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)[/TD]
[TD="class: filtrer"]02/02/2015[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD="class: filtrer"]National Centre for Foreign Animal Disease, Canadian Food Inspection Agency (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)[/TD]
[TD="class: filtrer"]04/02/2015[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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[TD="class: filtrer"]National Centre for Foreign Animal Disease, Canadian Food Inspection Agency (National laboratory)[/TD]
[TD="class: filtrer"]Birds[/TD]
[TD="class: filtrer"]virus sequencing[/TD]
[TD="class: filtrer"]05/02/2015[/TD]
[TD="class: filtrer cb-centree last"]Positive[/TD]
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Future Reporting
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[TD="class: filtrer"]The event is continuing. Weekly follow-up reports will be submitted.[/TD]
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http://www.oie.int/wahis_2/public/w...?page_refer=MapFullEventReport&reportid=17152