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niman

H5N5 Confirmed Tufted Duck Werkendam Netherlands

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Netherlands has reported a HPAI H5N5 infection in a Tufted Duck near Werkendam.  This infection is likely an H5N8 reassortant, since H5N8 in tufted ducks in Europe is common, and 4 tufted ducks infected with clade 2.3.4. H5N8 were reported earlier at the same location.

 

http://www.oie.int/wahis_2/temp/reports/en_imm_0000021909_20161215_141527.pdf

Edited by niman

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Highly pathogenic avian influenza,
Netherlands
 
Information received on 15/12/2016 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 14/11/2016
Date of confirmation of the event 13/12/2016
Report date 14/12/2016
Date submitted to OIE 15/12/2016
Reason for notification First occurrence of a listed disease
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus in wild birds
Serotype H5N5
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 (HPAI 2016/1 H5N5) Werkendam, NOORD-BRABANT
Date of start of the outbreak 14/11/2016
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Tufted Duck:Aythya fuligula(Anatidae)   1 1 0 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Tufted Duck:Aythya fuligula(Anatidae)   1 1 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% **
*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 H5N5 was confirmed in one tufted duck found in a wetland area near Werkendam.
 
Control measures
Measures applied
  • 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) Tufted Duck polymerase chain reaction (PCR) 13/12/2016 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations
 

http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=21909&newlang=en

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Bird flu H5N5 established tufted duck

Published on December 15, 2016
In a dead tufted duck found in Werkendam, adopted by Wageningen Bioveterinary Research (WBVR) highly pathogenic (highly contagious) H5N5 avian virus. In the submission of four tufted ducks were found the H5N5 virus in one animal, one animal was infected with both H5N5 and Influenza A virus subtype H5N8, and two animals were infected with Influenza A virus subtype H5N8.

It is not clear whether this virus also has (or will) spread within the Netherlands. It has so far not been found in wild birds at other locations. There are no other dead birds tested in Werkendam, so it is unclear whether the virus has spread locally well.

The sequence of the H5 gene in the H5N5 virus is the same as that in the Influenza A virus subtype H5N8 virus. This indicates that the Influenza A virus subtype H5N8 HP likely the segment N has exchanged with a low-pathogenic avian influenza virus, after which originated the HP H5N5 virus. WBVR will continue to study, in which the sequence of the entire virus genome is determined. This will tell how and where this exchange of the N segments (reassortment) occurred.

https://www.wur.nl/nl/artikel/Vogelgriep-H5N5-vastgesteld-in-kuifeend.htm

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Flu-lab-net posting: We recently detected H5N5 HP in a tufted duck found dead in a wetland area (near Werkendam) in the Netherlands. The virus was detected in a group of 4 tufted ducks submitted to WBVR for AI detection. The H5N5 virus was detected in one animal, one animal was infected with both H5N5 and H5N8, and two animals were infected with H5N8.

It is not known whether this virus has (or will) spread within the Netherlands. It has so far not been found in wild birds from other locations. There are no other dead birds tested from the same location (Werkendam), so it is also unclear whether the virus has spread locally. 

The sequence of the HA gene in the HP H5N5 virus is similar to that of the HP H5N8 virus, with the same highly-pathogenic cleavage site (PLREKRRKR/GLF). This indicates that H5N8 HP likely exchanged the N segment with a LPAI virus, resulting in the HP H5N5 virus. Sequencing of the full genome will be performed to provide more details on the reassortment event.

 

Nancy Beerens, PhD

Wageningen Bioveterinary Research
Division of Virology 

Edited by niman

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3 hours ago, niman said:

Netherlands has reported a HPAI H5N5 infection in a Tufted Duck near Werkendam.  This infection is likely an H5N8 reassortant, since H5N8 in tufted ducks in Europe is common, and 4 tufted ducks infected with clade 2.3.4. H5N8 were reported earlier at the same location.

 

http://www.oie.int/wahis_2/temp/reports/en_imm_0000021909_20161215_141527.pdf

Further explanations indicated that the four tufted ducks reported earlier included 2 ducks with H5N8, 1 duck with H5N8 and H5N5, and 1 duck with H5N5.  Sequencig of H5 reveal virually identical sequences with REKRRKR (same as H5N8 circulating in Europe).

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THE HAGUE - In a tufted duck found dead in Werkendam has discovered a new strain of bird flu. In a second duck was found a combination of viruses, reported State Martijn van Dam to parliament Thursday.

When the first animal concerns the highly pathogenic H5N5 AI virus, the second had a combination of Influenza A virus subtype H5N8 / H5N5. According to Van Dam remains the risk of infection remains high,, '. For the measures taken, the new finds have no effect.

http://www.telegraaf.nl/binnenland/27246350/__Nieuwe_variant_vogelgriep__.html?utm_source=t.co&utm_medium=referral&utm_campaign=twitter&apw_campaign=305ee9277a2a9adea1fca364c8131074

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