| Information received on 24/03/2017 from Dr John Clifford, Official Delegate, Chief Trade Advisor, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America | |
|
Summary
| Report type |
Follow-up report No. 1 |
| Date of start of the event |
06/03/2017 |
| Date of confirmation of the event |
08/03/2017 |
| Report date |
24/03/2017 |
| Date submitted to OIE |
24/03/2017 |
| Reason for notification |
Reoccurrence of a listed disease |
| Date of previous occurrence |
2017 |
| Manifestation of disease |
Sub-clinical infection |
| Causal agent |
Low pathogenic avian influenza virus |
| Serotype |
H7N9 |
| Nature of diagnosis |
Laboratory (advanced) |
| This event pertains to |
a defined zone within the country |
| Related reports |
Immediate notification (10/03/2017)
Follow-up report No. 1 (24/03/2017)
| |
|
|
| Outbreak 1 (00M2W4L) |
Lauderdale County, Lauderdale, ALABAMA |
| Date of start of the outbreak |
09/03/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
16931 |
|
0 |
16931 |
0 | |
| Affected population |
Commercial chicken broiler-breeder flock | |
| Outbreak 2 (00N84BM) |
Pickens County, Pickens, ALABAMA |
| Date of start of the outbreak |
15/03/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
25000 |
|
0 |
25000 |
0 | |
| Affected population |
Commercial chicken broiler-breeder flock | |
| Outbreak 3 (00N8JDS) |
Cullman County, Cullman, ALABAMA |
| Date of start of the outbreak |
17/03/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
24000 |
|
0 |
|
0 | |
| Affected population |
Commercial chicken broiler-breeder flock | |
| Summary of outbreaks |
Total outbreaks: 3 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
65931 |
** |
0 |
41931 |
0 | |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
** |
0.00% |
** |
** | |
| *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 part of routine testing and surveillance for H5/H7 Avian Influenza, low pathogenic avian influenza (LPAI) H7N9 of North American wild bird lineage was detected in healthy broiler breeder chickens. Although this is a low pathogenicity H7 strain, as a precautionary preventive measure, flocks are being depopulated. The USDA Animal Plant Health Inspection Service (APHIS) and State Departments of Agriculture are conducting comprehensive epidemiological investigations and have implemented enhanced surveillance and testing related to the event. | |
|
|
Control measures
| Measures applied |
- Movement control inside the country
- Disinfection / Disinfestation
- Quarantine
- Surveillance outside containment and/or protection zone
- Stamping out
- Official disposal of carcasses, by-products and waste
- Surveillance within containment and/or protection zone
- Zoning
- Vaccination prohibited
- No treatment of affected animals
|
| Measures to be applied |
| |
|
Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| National Veterinary Services Laboratories (NVSL) (National laboratory) |
Birds |
polymerase chain reaction (PCR) |
14/03/2017 |
Positive |
| National Veterinary Services Laboratories (NVSL) (National laboratory) |
Birds |
polymerase chain reaction (PCR) |
16/03/2017 |
Positive |
| National Veterinary Services Laboratories (NVSL) (National laboratory) |
Birds |
polymerase chain reaction (PCR) |
21/03/2017 |
Positive |
| National Veterinary Services Laboratories (NVSL) (National laboratory) |
Birds |
virus isolation |
23/03/2017 |
Positive | |
|
Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. | |
