Netherlands - LP H7N9 Avian Flu in Friesland province

[Gert van der Hoek]

A mild form of bird flu had been detected in a poultry farm with 48,000 chickens in the Frisian Hiaure. It probably is the H7 variant.

The mild H7 strain of bird flu could mutate to a highly contagious and deadly variant for chickens. The birds in the farm are culled.

In an area of one kilometer around the holding in the municipality Dongeradeel a transportation ban for poultry, poultry manure, eggs, used litter has been installed. There are no other chicken farms in the area.

[bertrand789]

Low pathogenic avian influenza (poultry), Netherlands

Information received on 10/06/2016 from Dr Christianne Bruschke, Chief Veterinary Officer , Ministry of Economic Affairs, Ministry of Economic Affairs, The Hague, Netherlands Summary

Report type	Immediate notification
Date of start of the event	08/06/2016
Date of confirmation of the event	09/06/2016
Report date	10/06/2016
Date submitted to OIE	10/06/2016
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	03/04/2015
Manifestation of disease	Clinical disease
Causal agent	Low pathogenic avian influenza virus
Serotype	H7N9
Nature of diagnosis	Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks	Total outbreaks: 1
Outbreak Location	FRIESLAND (Hiaure)
Total animals affected	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 44630 ** 44630
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	Unknown or inconclusive
Epidemiological comments	A 1 km restriction zone has been established on 09/06/2016. There are no other premises in the 1 km zone.

Control measures

Measures applied	Movement control inside the country Screening Stamping out Zoning Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type	Central Veterinary Institute, Lelystad (National laboratory)
Tests and results	Species Test Test date Result Birds polymerase chain reaction (PCR) 09/06/2016 Positive

Future Reporting

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

...

http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=20307

[Gert van der Hoek]

Avian Flu Virus Influenza A virus subtype H7N9 Hiaure not related to Chinese virus

Published on June 13, 2016

The Influenza A virus subtype H7N9 virus found in the Netherlands found is not related to the Influenza A virus subtype H7N9 LPAI virus circulating in China that can cause illness and death in humans. This is evident from the first examination of CVI into the origin of the virus confirmed in Hiaure .

On Thursday, June 9th bird flu (avian influenza, AI) was confirmed by CVI on a farm with free-range chickens in Hiaure (Friesland). The genetic material of one H7 virus was confirmed with the aid of PCR-test. It is a low pathogenic (LPAI) variant of the bird flu virus, which corresponds to the mild clinical symptoms. Then, through research (sequencing) the N-subtype was detected, and it became clear that it is an Influenza A virus subtype H7N9 virus.

Further analysis of the sequence of a portion of the H- and N-segment shows a relationship with variations of avian influenza viruses that circulate in Europe in wild birds. In the Netherlands found Influenza A virus subtype H7N9 virus is not related to zoonotic virus that may cause morbidity and mortality in people in China circulating LPAI Influenza A virus subtype H7N9. At this time, CVI carries out further research to determine the sequence of the entire genome of the virus. This may provide more insight into the origin and introduction route of the Influenza A virus subtype H7N9 bird flu virus in Friesland.

In the Netherlands, there are 30 to 50 introductions of mild forms of avian influenza annually. In case of infections with low pathogenic variants of the H5 or H7-type (about three - six per year) additional measures are taken. These viruses can mutate into the highly pathogenic dangerous (highly contagious and deadly for chickens) .

Veterinary Institute