Netherlands - New bird flu case reported in Zoeterwoude; Zuid-Holland province

[Gert van der Hoek]

Dutch authorities say latest outbreak came in poultry farm close to where highly infectious H5N8 strain found two weeks ago (4 days ago, GvdH)

Dutch authorities have reported a fresh outbreak of bird flu on a poultry farm in the west of the country, but could not say if it was the worrying new strain detected elsewhere in the Netherlands.

?Avian influenza has been detected on a poultry farm at Zoeterwoude, where some 28,000 birds are affected,? the economy ministry said in a statement on Sunday.

?The birds are infected with the H5 variant of the flu but it?s not yet known whether of the highly pathogenic variety or not,? it added.

[Pathfinder]

Highly pathogenic avian influenza, Netherlands

Information received on 28/12/2016 from Dr Christianne Bruschke, Chief Veterinary Officer , Ministry of Economic Affairs, Ministry of Economic Affairs, The Hague, Netherlands

Summary Report type Follow-up report No. 4 Date of start of the event 25/11/2016 Date of confirmation of the event 26/11/2016 Report date 28/12/2016 Date submitted to OIE 28/12/2016 Reason for notification Reoccurrence of a listed disease Date of previous occurrence 04/2015 Manifestation of disease Clinical disease Causal agent Highly pathogenic avian influenza virus Serotype H5N8 Nature of diagnosis Laboratory (advanced) This event pertains to a defined zone within the country Related reports Immediate notification (28/11/2016) Follow-up report No. 1 (05/12/2016) Follow-up report No. 2 (14/12/2016) Follow-up report No. 3 (19/12/2016) Follow-up report No. 4 (28/12/2016)

New outbreaks (3)

Outbreak 1 (HPAI 2016/07 P) Boven Leeuwen, GELDERLAND Date of start of the outbreak 19/12/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 48082 240 240 47842 0 Affected population Breeding parent flock

Outbreak 2 (HPAI 2016/8 P) Stolwijk, ZUID-HOLLAND Date of start of the outbreak 21/12/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 6594 39 39 6555 0 Affected population Laying hens

Outbreak 3 (HPAI 2016/9 P) Zoeterwoude, ZUID-HOLLAND Date of start of the outbreak 24/12/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 27000 869 869 26131 0 Affected population Breeding flock

Summary of outbreaks Total outbreaks: 3 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 81676 1148 1148 80528 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 1.41% 1.41% 100.00% 100.00% *Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology Source of the outbreak(s) or origin of infection Unknown or inconclusive Epidemiological comments Boven Leeuwen: On 20 December 2016, a 3-km surveillance and a 10-km protection zones have been established. In the 3-km zone there are nine other premises. All susceptible animals on the infected premises have been killed. All premises in the 3-km zone have been screened. All samples of the screened premises were tested negative. Stolwijk: On 22 December 2016, a 3-km surveillance and a 10-km protection zones have been established. In the 3-km zone there is one other premise. All susceptible animals on the infected premise have been killed. All premises in the 3-km zone have been screened. All samples of the screened premises were tested negative. Zoeterwoude: On 25 December 2016, a 3-km surveillance and a 10-km protection zones have been established. In the 3-km zone there are two other premises. All susceptible animals on the infected premises have been killed. All premises in the 3-km zone have been screened. All samples of the screened premises were tested negative.

Control measures Measures applied Movement control inside the country Screening Disinfection / Disinfestation Stamping out Control of wildlife reservoirs Zoning 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 Wageningen Bioveterinary Research, Lelystad (National laboratory) Birds polymerase chain reaction (PCR) 21/12/2016 Positive Wageningen Bioveterinary Research, Lelystad (National laboratory) Birds polymerase chain reaction (PCR) 21/12/2016 Positive Wageningen Bioveterinary Research, Lelystad (National laboratory) Birds polymerase chain reaction (PCR) 23/12/2016 Positive Wageningen Bioveterinary Research, Lelystad (National laboratory) Birds polymerase chain reaction (PCR) 27/12/2016 Positive

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

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=22018