English | Français | Español
Event summary: Highly pathogenic avian influenza, United States of America
Start of event 10/12/2014
Confirmation 15/12/2014
Report date 16/12/2014
Submission date 16/12/2014
Reason Recurrence
This event pertains to a defined zone within the country
Number of outbreaks 241
Date resolved 13/11/2015
Epidemiological comments As a precaution and in response to the recent HPAI outbreak in Canada, surveillance of poultry premises and of wild bird mortality events was enhanced by the USDA, and State personnel along the United States - Canadian Border. Through this surveillance, highly pathogenic avian influenza (HPAI) H5 was identified in wild birds. Two serotypes were identified on enhanced surveillance, both with amino acid sequence at the HA cleavage site consistent with HPAI, H5N8 and H5N2. H5N8 was identified in a captive wild gyrfalcon that was fed hunter killed wild birds from Whatcom County, Washington and H5N2 was identified in a wild pintail duck also from Whatcom County, Washington. Preliminary analysis suggests this H5N2 is similar to the HPAI identified in the current Canadian outbreak. Based upon sequence attempt from a virus isolate, an avian influenza subtype H5 of Eurasian lineage (partial HA 98% similarity to A/bean goose/Korea/H40/2014) and N2 of US wild bird lineage (partial NA 98% similarity to A/American green-winged teal/California/HKWF609/2007); the amino acid sequence at the hemagglutinin cleavage site is consistent with highly pathogenic avian influenza (HPAI). Preliminary data suggests that these virus strains (H5N2 and H5N8) may be related with the H5N8 strain potentially representing the progenitor; however further analysis is needed. Neither of these viruses has been found in any poultry in the United States. These H5N8 and H5N2 detections involve only wild birds. Further investigation and characterization of the HPAI viruses is ongoing.
United States of America has submitted the following immediate notification and follow-up report (s) to OIE.

View Report Date Date submitted to OIE Report Type
Full report 16/12/2014 16/12/2014 Immediate notification
Full report 07/01/2015 07/01/2015 Follow-up Report 1
Full report 13/01/2015 13/01/2015 Follow-up Report 2
Full report 22/01/2015 22/01/2015 Follow-up Report 3
Full report 03/02/2015 04/02/2015 Follow-up Report 4
Full report 17/02/2015 17/02/2015 Follow-up Report 5
Full report 24/02/2015 24/02/2015 Follow-up Report 6
Full report 06/03/2015 06/03/2015 Follow-up Report 7
Full report 12/03/2015 12/03/2015 Follow-up Report 8
Full report 20/03/2015 20/03/2015 Follow-up Report 9
Full report 31/03/2015 31/03/2015 Follow-up Report 10
Full report 08/04/2015 08/04/2015 Follow-up Report 11
Full report 15/04/2015 15/04/2015 Follow-up Report 12
Full report 24/04/2015 24/04/2015 Follow-up Report 13
Full report 01/05/2015 01/05/2015 Follow-up Report 14
Full report 08/05/2015 08/05/2015 Follow-up Report 15
Full report 20/05/2015 20/05/2015 Follow-up Report 16
Full report 29/05/2015 29/05/2015 Follow-up Report 17
Full report 09/06/2015 09/06/2015 Follow-up Report 18
Full report 17/06/2015 17/06/2015 Follow-up Report 19
Full report 26/06/2015 26/06/2015 Follow-up Report 20
Full report 02/07/2015 02/07/2015 Follow-up Report 21
Full report 22/07/2015 22/07/2015 Follow-up Report 22
Full report 31/07/2015 04/08/2015 Follow-up Report 23
Full report 10/08/2015 10/08/2015 Follow-up Report 24
Full report 17/08/2015 17/08/2015 Follow-up Report 25
Full report 24/08/2015 24/08/2015 Follow-up Report 26
Full report 01/09/2015 01/09/2015 Follow-up Report 27
Full report 08/09/2015 08/09/2015 Follow-up Report 28
Full report 14/09/2015 14/09/2015 Follow-up Report 29
Full report 21/09/2015 21/09/2015 Follow-up Report 30
Full report 07/10/2015 07/10/2015 Follow-up Report 31
Full report 13/10/2015 13/10/2015 Follow-up Report 32
Full report 13/11/2015 13/11/2015 Follow-up Report 33
Full report 18/11/2015 18/11/2015 Follow-up Report 34 (Resolved : 13/11/2015 Final report )