| Information received on 09/05/2017 from Dr Zhang Zhongqiu, Director General , China Animal Disease Control Centre, Veterinary Bureau, Ministry of Agriculture, Beijing, China (People´s Rep. of) | |
|
Summary
| Report type |
Follow-up report No. 2 |
| Date of start of the event |
10/01/2017 |
| Date of confirmation of the event |
18/02/2017 |
| Report date |
09/05/2017 |
| Date submitted to OIE |
09/05/2017 |
| Reason for notification |
Recurrence of a listed disease |
| Date of previous occurrence |
2015 |
| Manifestation of disease |
Clinical disease |
| Causal agent |
Highly pathogenic avian influenza virus |
| Serotype |
H7N9 |
| Nature of diagnosis |
Clinical, Laboratory (basic), Laboratory (advanced) |
| This event pertains to |
a defined zone within the country |
| Related reports |
Immediate notification (18/02/2017)
Follow-up report No. 1 (01/03/2017)
Follow-up report No. 2 (09/05/2017)
| |
|
|
| Outbreak 1 |
Chenzhou, Jiahe, HUNAN |
| Date of start of the outbreak |
23/02/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Backyard |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
911 |
|
|
911 |
0 | |
| Affected population |
4 chicken swab samples were collected in a backyard, the results were positive. All live poultry markets were closed, cleaned and disinfected.No unusual situation was observed in local poultry farms. | |
| Outbreak 2 |
Chenzhou, HUNAN |
| Date of start of the outbreak |
23/02/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Livestock market |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
|
|
|
|
| |
| Affected population |
3 chicken swab samples, 1 duck swab samples, and 4 environment samples were tested and the results were positive in 3 different live bird markets. | |
| Outbreak 3 |
Guangzhou, GUANGDONG |
| Date of start of the outbreak |
02/03/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Livestock market |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
|
|
|
|
| |
| Affected population |
2 chicken swab samples were tested and the results were positive in 2 different live bird market. | |
| Outbreak 4 |
Zhongshan, GUANGDONG |
| Date of start of the outbreak |
02/03/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Livestock market |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
|
|
|
|
| |
| Affected population |
One chicken swab sample was tested and the result was positive in live bird market. | |
| Outbreak 5 |
Meizhou, GUANGDONG |
| Date of start of the outbreak |
02/03/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Livestock market |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
|
|
|
|
| |
| Affected population |
One chicken swab sample was tested and the result was positive in live bird market. | |
| Outbreak 6 |
Xingtai, Xingtai, HEBEI |
| Date of start of the outbreak |
28/04/2017 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
30000 |
8500 |
5000 |
25000 |
0 | |
| Affected population |
The outbreak was observed in local layer farm by active surveillance. | |
| Summary of outbreaks |
Total outbreaks: 6 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
30911 |
8500 ** |
5000 |
25911 |
0 | |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
** |
** |
** |
** | |
| *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 |
The outbreaks were found through active surveillance. Clinical signs were observed by monitoring and investigation. All susceptible birds were destroyed. | |
|
|
Control measures
| Measures applied |
- Movement control inside the country
- Screening
- Disinfection / Disinfestation
- Quarantine
- Stamping out
- Vaccination prohibited
- No treatment of affected animals
|
| Measures to be applied |
| |
|
Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| Harbin National Reference Lab for Avian Influenza (OIE Reference Laboratory) |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
05/05/2017 |
Positive |
| Harbin National Reference Lab for Avian Influenza (OIE Reference Laboratory) |
Birds |
virus isolation |
05/05/2017 |
Positive |
| Harbin National Reference Lab for Avian Influenza (OIE Reference Laboratory) |
Birds |
virus sequencing |
02/03/2017 |
Positive |
| Harbin National Reference Lab for Avian Influenza (OIE Reference Laboratory) |
Birds |
virus sequencing |
06/03/2017 |
Positive |
| Harbin National Reference Lab for Avian Influenza (OIE Reference Laboratory) |
Birds |
virus sequencing |
05/05/2017 |
Positive | |
|
Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. | |
