OIE: Highly pathogenic avian influenza ,United States of America
submited by kickingbird at Dec, 17, 2014 7:5 AM from OIE
Information received on 16/12/2014 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America
Summary
| Report type |
Immediate notification |
| Date of start of the event |
10/12/2014 |
| Date of pre-confirmation of the event |
15/12/2014 |
| Report date |
16/12/2014 |
| Date submitted to OIE |
16/12/2014 |
| Reason for notification |
Reoccurrence of a listed disease |
| Date of previous occurrence |
2004 |
| Manifestation of disease |
Clinical disease |
| Causal agent |
Highly pathogenic avian influenza virus |
| Serotype |
H5N2 |
| Nature of diagnosis |
Laboratory (advanced) |
| This event pertains to |
a defined zone within the country |
New outbreaks
| Summary of outbreaks |
Total outbreaks: 1 |
| Outbreak Location |
- WASHINGTON ( Whatcom County, Whatcom )
|
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Northern Pintail:Anatidae (Anas acuta) |
|
** |
|
|
| |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Northern Pintail:Anatidae (Anas acuta) |
** |
** |
** |
** |
* 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 |
|
| 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. |
Control measures
| Measures applied |
- Vaccination prohibited
- No treatment of affected animals
|
| Measures to be applied |
|
Diagnostic test results
| Laboratory name and type |
National Veterinary Services Laboratories (NVSL) ( National laboratory ) |
| Tests and results |
| Species |
Test |
Test date |
Result |
| Northern Pintail |
gene sequencing |
|
Pending |
| Northern Pintail |
haemagglutination (HA) test |
15/12/2014 |
Positive |
| Northern Pintail |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
15/12/2014 |
Positive |
| Northern Pintail |
virus isolation |
15/12/2014 |
Positive | |
Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |
