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PostPosted: Wed Dec 10, 2014 3:36 pm 
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Published Date: 2014-12-10 12:27:04
Subject: PRO/AH/EDR> Avian influenza (104): Canada (BC) HPAI H5N2, poultry, update, OIE
Archive Number: 20141210.3024271
AVIAN INFLUENZA ( ): CANADA (BRITISH COLUMBIA) HPAI H5N2, POULTRY, UPDATE, OIE
******************************************************************************
A ProMED-mail post
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ProMED-mail is a program of the
International Society for Infectious Diseases
http://www.isid.org

AVIAN INFLUENZA (104): CANADA (BRITISH COLUMBIA) HPAI H5N2, POULTRY, UPDATE, OIE

Date: Tue 9 Dec 2014
Source: OIE, WAHID (World Animal Health Information Database), weekly disease information 2014; 27(50) [edited]
http://www.oie.int/wahis_2/public/wahid ... rtid=16700


Highly pathogenic avian influenza, Canada
-----------------------------------------
Information received on [and dated] 9 Dec 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 Nov 2014
Date of pre-confirmation of the event: 1 Dec 2014
Reason for notification: reoccurrence of a listed disease
Date of previous occurrence: January 2008
Manifestation of disease: clinical disease
Causal agent: Avian influenza virus
Serotype: H5N2
Nature of diagnosis: laboratory (advanced)
This event pertains to a defined zone within the country

New outbreaks (3)
Outbreak 1 (BC-2014-NAI-003): Abbotsford, British Columbia
Date of start of the outbreak: 2 Dec 2014
Outbreak status: continuing (or date resolved not provided)
Epidemiological unit: farm
Affected animals
Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
Birds / 14 000 / 250 / 250 / 13 750 / 0
Affected population: BC-2014-NAI-003 Chicken broiler breeder farm. Affected barn holds hens and roosters 37 week old (sudden death). In addition, 2 week old pullets on the premises with normal mortality rate.

Outbreak 2 (BC-2014-NAI-004): Abbotsford, British Columbia
Date of start of the outbreak: 2 Dec 2014
Outbreak status: continuing (or date resolved not provided)
Epidemiological unit: farm
Affected animals
Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
Birds / 27 000 / 22 / 22 / 26 978 / 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 3 (BC-2014-NAI-005): Abbotsford, British Columbia
Date of start of the outbreak: 4 Dec 2014
Outbreak status: continuing (or date resolved not provided)
Epidemiological unit: farm
Affected animals
Species / Susceptible / Cases / Deaths / Destroyed / Slaughtered
Birds / 31 000 / 50 / 50 / - / -
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 / Destroyed / Slaughtered
Birds / 72 000 / 322 / 322 / 40 728 / 0 /
Outbreak statistics [rates apparent, expressed as percentages]
Species / Morbidity rate / Mortality rate / Case fatality rate / Proportion susceptible animals lost*
Birds / 0.45 / 0.45 / 100 / **
*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: 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 [intravenous pathogenicity index] 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 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 Dec 2014, the CFIA 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/te ... 8073267337.

Control measures
Measures applied: stamping out; quarantine; movement control inside the country; screening; zoning; vaccination prohibited; no treatment of affected animals
Measures to be applied: disinfection of infected premises/establishment(s)

Diagnostic test results
Laboratory name and type:
National Centre for Foreign Animal Disease, Canadian Food Inspection Agency (national laboratory)
Species / Test / Test date / Result
Birds / real-time reverse transcription-polymerase chain reaction (RRT-PCR) / 3 Dec 2014 / Positive
Birds / virus isolation / 4 Dec 2014 / Positive
Birds / Virus sequencing / 4 Dec 2014/ Positive
Birds / intravenous pathogenicity index (IVPI) test / 6 Dec 2014 / Positive

Future reporting
The event is continuing. Weekly follow-up reports will be submitted.

[The location of the outbreaks can be seen on the interactive map included in the OIE report at the source URL above.]

--
Communicated by:
ProMED-mail
<promed@promedmail.org>

[The following information was obtained from the link provided in the epidemiological comment section of the report, http://www.inspection.gc.ca/an.imals/te ... 8073267337: "In order to prevent the spread of highly pathogenic avian influenza in British Columbia, the Canadian Food Inspection Agency (CFIA) has established a primary control zone in the area where the disease has been identified.

The Province of British Columbia and the poultry industry support this decision and are working together with the CFIA to implement it.

Avian influenza is highly contagious between birds and can spread rapidly. Because southern British Columbia has a high concentration of poultry operations, the primary control zone covers an area beyond the premises that are currently affected.

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. A map is available on the CFIA website at http://www.inspection.gc.ca/animals/ter ... 8041743149.

The primary control zone is divided into 3 disease control zones: infected, restricted, and security.
- The outer boundary of an infected zone is up to 3 km [2 mi] from any known infected premises.
- The restricted zone is established surrounding the infected zone and measured based on the epidemiology of the disease in order to prevent the spread of avian influenza (3 km to 10 km [2-6 mi]).
- The security zone is the remainder of the primary control zone (beyond 10 km [6 mi]).

The 3 zones represent relative levels of risk and movement restrictions vary accordingly. Most of the restrictions apply to the infected and restricted zones because of the greater potential that the virus can spread.

The movement restrictions apply to:
- captive birds (including but not limited to poultry, fowl, and pet birds);
- poultry products or by-products;
- anything that has been exposed to captive birds (which could include but is not limited to feed, vehicles, equipment, or clothing).

All movement of captive birds in and out of, and through this zone is strictly controlled and requires a permit from the CFIA (http://www.inspection.gc.ca/animals/ter ... 8042485919). The movement restrictions also apply to poultry products and by-products and material that has come into contact with captive birds.

Avian influenza viruses do not pose risks to food safety when poultry and poultry products are properly handled and cooked. Avian influenza rarely affects humans that do not have consistent contact with infected birds. Public health authorities stand ready to take precautionary measures as warranted.

Poultry farmers are urged to take an active role in protecting their flocks by employing strict biosecurity measures on their property, and immediately reporting any suspicious symptoms to the CFIA."

For more information and updates on avian influenza in Canada, the subscriber may be interested in visiting the CFIA website at http://www.inspection.gc.ca/animals/ter ... 3991018946. - Mod.CRD

A HealthMap/ProMED-mail map can be accessed at: http://healthmap.org/promed/p/264.]
See Also
Avian influenza (102): Canada (BC) HPAI H5N2, poultry 20141205.3012874
Avian influenza (101): Canada (BC) H5, poultry, RFI, OIE: 20141204.3011429
Avian influenza, human (70): Canada (AB) ex China, H5N1, bird market origin susp. 20140212.2274077
Avian influenza, human (23): Canada ex China (BJ) H5N1 strain similarity 20140118.2182743
Avian influenza, human (10): Canada ex China (Beijing) H5N1, fatal 20140108.2160514
2011
----
Avian influenza (67): Canada (BC), LPAI H7, migratory birds 20111104.3286

2010
----
Avian influenza - Canada (53): (MB) LPNAI H5N2, turkey 20101126.4260
and older items in the archives
.................................................crd/mj/lm

http://promedmail.org/direct.php?id=20141210.3024271

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