Information received on 01/02/2021 from Mr Knut R?nningen, Director, Norwegian Food Safety Authority, Ministry of Agriculture and Food, Brumunddal, Norway
Summary
Report type
Follow-up report No. 4
Date of start of the event
22/11/2020
Date of confirmation of the event
27/11/2020
Report date
01/02/2021
Date submitted to OIE
01/02/2021
Reason for notification
First occurrence of a listed disease in the country
Causal agent
Highly pathogenic influenza A virus
Serotype
H5N8
Nature of diagnosis
Laboratory (advanced)
This event pertains to
the whole country
Related reports
Immediate notification (30/11/2020)
Follow-up report No. 1 (09/12/2020)
Follow-up report No. 2 (23/12/2020)
Follow-up report No. 3 (22/01/2021)
Follow-up report No. 4 (01/02/2021)
New outbreaks (2)

Outbreak 1
Bergen, Tveitevannet, Bergen og Omland Dep, South and West Region , Hordaland
Date of start of the outbreak
25/01/2021
Outbreak status
Resolved (28/01/2021)
Epidemiological unit
Other
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Mute Swan:Cygnus olor(Anatidae)

1
1


Affected population
One wild mute swan (Cygnus olor) was found dead and sent for testing as a consequence of increased surveillance due to the ongoing event of highly pathogenic avian influenza in wild birds (ref ADNS 21/4, 29.1.21)
Outbreak 2
Bergen, Bystranda, Bergen og Omland Dep, South and West Region , Hordaland
Date of start of the outbreak
26/01/2021
Outbreak status
Resolved (28/01/2021)
Epidemiological unit
Other
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Mute Swan:Cygnus olor(Anatidae)

1
1


Affected population
One wild mute swan (Cygnus olor) was found dead and sent for testing as a consequence of increased surveillance due to the ongoing event of highly pathogenic avian influenza in wild birds (ref ADNS 21/4, 29.1.21)
Summary of outbreaks
Total outbreaks: 2
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Mute Swan:Cygnus olor(Anatidae)

2
2


Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Mute Swan:Cygnus olor(Anatidae)
**
**
100.00%
**
*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
Contact with wild species
Epidemiological comments
There has already been set a high-risk area for highly pathogenic avian influenza H5N8 in all counties south of Nordland county. This includes Trondelag, More & Romsdal, Vestland, Innlandet, Viken, Agder, Rogaland, Oslo, and Vestfold & Telemark counties. The short version of the implications is that, in high-risk areas, it is forbidden: - to keep poultry and other birds in captivity outdoors, - the use of outdoor water reservoirs for poultry or other captive birds, - to keep ducks and geese together with other poultry species, - to collect poultry or other birds in captivity at markets, shows or exhibitions or in connection with cultural events. Poultry and other captive birds kept in high-risk areas may not participate in such events held outside the high-risk areas, - the use of decoys of the orders ducks (Anseriformes) and waders, gulls and auks (Charadriiformes), - to release bird game. In high-risk areas, the animal’s owner must report the animal husbandry to the Norwegian Food Safety Authority. The owner’s name and address and the number of poultry and other captive birds must be reported. Letter pigeons in high-risk areas must be permanently marked. - to supply poultry or other captive birds with drinking water from surface water reservoirs that are not protected against wild birds and other animals. If biosecurity measures have been taken to prevent the transmission of highly pathogenic avian influenza viruses, it is nevertheless permitted to supply poultry and other captive birds with surface water that wild waterfowl have access to provided that the water is treated in a way that ensures inactivation of avian influenza viruses. - to keep feed for poultry or other birds in captivity unprotected from wild birds and other animals. Most of these have some kind of leniency regulation with certain demands, but they are not reproduced here. The high-risk area is defined in the regulation published here in Norwegian: https://lovdata.no/forskrift/2005-12-05-1417. There has also been laid down a hunting ban in the high-risk area from 14th December 2020 until further notice on hunting of: cormorants, crows, ravens, black-billed magpie, Eurasian wigeon, greylag goose, Canada goose, muscovy duck, pink-footed goose, Eurasian teal, common goldeneye. The hunting ban regulation is published here in Norwegian: https://lovdata.no/LTI/forskrift/2020-12-14-2728(ref ADNS 21/4, 29.1.21).

Control measures
Measures applied
Surveillance outside containment and/or protection zone
Surveillance within containment and/or protection zone
Disinfection
Vaccination prohibited
No treatment of affected animals
Measures to be applied
No other measures
Diagnostic test results
Laboratory name and type
Species
Test
Test date
Result
Norwegian Veterinary Institute (National laboratory)
Mute Swan
real-time PCR
11/01/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.