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Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Netherlands
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Information received on 23/12/2020 from Dr Christianne Bruschke, Chief Veterinary Officer , Agriculture, Nature and Food Quality,
Ministry of Agriculture, Nature and Food Quality, The Hague, Netherlands
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Summary
| Report type |
Follow-up report No. 1 |
| Date of start of the event |
16/10/2020 |
| Date of confirmation of the event |
27/10/2020 |
| Report date |
23/12/2020 |
| Date submitted to OIE |
23/12/2020 |
| Reason for notification |
New strain of a listed disease in the country |
| Causal agent |
Highly pathogenic influenza A virus |
| Serotype |
H5N1 |
| Nature of diagnosis |
Clinical, Laboratory (advanced) |
| This event pertains to |
a defined zone within the country |
| Related reports |
Immediate notification (07/11/2020)
Follow-up report No. 1 (23/12/2020)
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| Outbreak 1 |
Groet, Noord-Holland |
| Date of start of the outbreak |
09/11/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Other |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Mute Swan:Cygnus olor(Anatidae) |
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1 |
1 |
0 |
0 |
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| Affected population |
On the 9th of November, one mute swan (Cygnus Olor) was found dead in a wetland area. On the 23rd of November, the National Reference Laboratory confirmed highly pathogenic avian influenza H5N1 in the sample from the mute swan (Cygnus Olor). |
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| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Mute Swan:Cygnus olor(Anatidae) |
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1 |
1 |
0 |
0 |
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| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Mute Swan:Cygnus olor(Anatidae) |
** |
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100.00% |
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| *Removed from the susceptible population through death, destruction and/or slaughter |
| **Not calculated because of missing information |
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Epidemiology
| Source of the outbreak(s) or origin of infection |
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| Epidemiological comments |
The haemagglutinin (HA) is nearly identical to the HA of the H5N8 wild bird isolates reported in 2020. The other genes are of LPAI origin. |
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Control measures
| Measures applied |
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Vaccination prohibited
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No treatment of affected animals
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| Measures to be applied |
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Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| Wageningen Bioveterinary Research Lelystad (National laboratory) |
Mute Swan |
polymerase chain reaction (PCR) |
23/11/2020 |
Positive |
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Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |
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Map of outbreak locations
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