Low pathogenic avian influenza (poultry), Canada (4/6/2009)

[Giuseppe]

Low pathogenic avian influenza (poultry), Canada

Information received on 06/04/2009 from Dr Brian Evans, Chief Veterinary Officer, 59 Camelot Drive, Room 146 W, Canadian Food Inspection Agency, OTTAWA, Canada

-- Summary
Report type Follow-up report No. 5
Start date 12/01/2009
Date of first confirmation of the event 23/01/2009
Report date 03/04/2009
Date submitted to OIE 06/04/2009
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 2005
Manifestation of disease Sub-clinical infection
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 (24/01/2009)
* 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)

-- Outbreaks
There are no new outbreaks in this report

-- Epidemiology
Source of the outbreak(s) or origin of infection
* Unknown or inconclusive
* Wild birds

-- Epidemiological comments
The cleaning and disinfection of the second infected premises (2009-BC-002) was done under the direct supervision of the Canadian Food Inspection Agency (CFIA). It was completed and approved on 11 March 2009.
The CFIA conducted targeted and comprehensive surveillance on all commercial poultry farms located within 3 km of or with an epidemiological link with the two infected premises identified during this event. A total of 53 premises were investigated by the CFIA and representative samples of susceptible animals were tested.
All of the test results were negative for the presence of notifiable avian influenza (NAI).
While all these farms were maintained under quarantine during the investigation, all restrictions have now been lifted by the CFIA.
On 1 April 2009, the last two quarantines were released and there are no outstanding quarantines in place in the province of British Columbia.
The CFIA then started a post outbreak survey for NAI in the province of British Columbia on 11 March 2009, in accordance with Article 10.4.3.2, Chapter 10.4 (Avian Influenza) of the OIE Terrestrial Animal Health Code (2008).
The Canadian Notifiable Avian Influenza Surveillance System (CanNAISS) structure is being used for the design and implementation of the survey.
The CFIA expects to report the results in June 2009, 3 months after the cleaning and disinfection of the last infected premises, with the objective of regaining NAI free status for the province of British Columbia as per OIE guidelines.
The next follow-up report will be submitted in June 2009.

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
* Stamping out
* Quarantine
* Screening
* Disinfection of infected premises/establishment(s)
* Vaccination prohibited
* No treatment of affected animals
Measures to be applied
* No other measures

-- Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
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<cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=7967" >WAHID Interface - OIE World Animal Health Information Database</cite>