UK - 5 new outbreaks of highly pathogenic influenza H5N6 in wild birds, Hertfordshire, Warwickshire, Berkshire, Surrey (OIE, February 5, 2018)

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Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds), United Kingdom

Information received on 05/02/2018 from Dr Nigel Gibbens, Chief Veterinary Officer, Department for Environment, Food and Rural Affairs, Department for Environment, Food and Rural Affairs, LONDON, United Kingdom

Summary Report type Follow-up report No. 5 Date of start of the event 09/01/2018 Date of confirmation of the event 09/01/2018 Report date 05/02/2018 Date submitted to OIE 05/02/2018 Reason for notification New strain of a listed disease in the country Causal agent Highly pathogenic influenza A virus Serotype H5N6 Nature of diagnosis Clinical, Necropsy This event pertains to a defined zone within the country Related reports Immediate notification (10/01/2018) Follow-up report No. 1 (15/01/2018) Follow-up report No. 2 (17/01/2018) Follow-up report No. 3 (22/01/2018) Follow-up report No. 4 (29/01/2018) Follow-up report No. 5 (05/02/2018)

New outbreaks (5)

Outbreak 1 (WB AIV 2018/10) Hertfordshire, ENGLAND Date of start of the outbreak 05/02/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Natural park Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Tufted Duck:Aythya fuligula(Anatidae) 1 1 0 0 Affected population 1 tufted duck(Aythya fuligula) found dead in Hertfordshire

Outbreak 2 (WB AIV 2018/11) Warwickshire, ENGLAND Date of start of the outbreak 05/02/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Natural park Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Mute Swan:Cygnus olor(Anatidae) 1 1 0 0 Affected population 1 mute swan (Cygnus olor) found dead in a reservoir in Warwickshire.

Outbreak 3 (WB AIV 2018/07) Berkshire, ENGLAND Date of start of the outbreak 05/02/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Natural park Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Mute Swan:Cygnus olor(Anatidae) 5 5 0 0 Affected population 5 mute swans (Cygnus olor) found dead in river and tested positive for H5N6.

Outbreak 4 (WB AIV 2018/09) Surrey, ENGLAND Date of start of the outbreak 05/02/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Natural park Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Unidentified:Incognita(Incognita) 2 2 0 0 Affected population Two unidentified birds found dead in a body of water in Surrey.

Outbreak 5 (WB AIV 2018/08) Surrey, ENGLAND Date of start of the outbreak 05/02/2018 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) 1 1 0 0 Affected population One mute swan (Cygnus olor) found dead in wastewater treatment works in Surrey.

Summary of outbreaks Total outbreaks: 5 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Tufted Duck:Aythya fuligula(Anatidae) 1 1 0 0 Mute Swan:Cygnus olor(Anatidae) 7 7 0 0 Unidentified:Incognita(Incognita) 2 2 0 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Tufted Duck:Aythya fuligula(Anatidae) ** ** 100.00% ** Mute Swan:Cygnus olor(Anatidae) ** ** 100.00% ** Unidentified:Incognita(Incognita) ** ** 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 The virus is a reassortant between H5N8 HPAI circulating in Europe and a European N6.

Control measures Measures applied Official disposal of carcasses, by-products and waste Vaccination prohibited No treatment of affected animals Measures to be applied No other measures

Future Reporting The event is continuing. Weekly follow-up reports will be submitted.

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