Report type

Immediate notification

Date of start of the event

28/05/2015

Date of confirmation of the event

09/06/2015

Report date

10/06/2015

Date submitted to OIE

11/06/2015

Reason for notification

Reoccurrence of a listed disease

Date of previous occurrence

27/04/2015

Manifestation of disease

Clinical disease

Causal agent

Highly pathogenic avian influenza virus

Serotype

H5N1

Nature of diagnosis

Laboratory (basic), Laboratory (advanced)

This event pertains to

a defined zone within the country

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

• RESPUBLIKA TYVA ( Ubsu-Nur, Ovyursky )

Total animals affected

Outbreak statistics

* Removed from the susceptible population through death, destruction and/or slaughter; 
** Not calculated because of missing information;

Source of the outbreak(s) or origin of infection

• Contact with wild species

Epidemiological comments

During the active monitoring of the ornithofauna in the surroundings of Ubsu-Nur Lake, a few wild birds were found dead. Highly pathogenic avian influenza (HPAI) virus H5N1 was detected and isolated in samples from carcasses of two great crested grebes and two common terns. No HPAI virus H5N1 has been detected in samples from healthy migratory birds of different species: great crested grebes (Podiceps cristatus), great cormorant (Phalacrocorax carbo), red-crested pochard (Netta rufina), gadwall (Anas strepera), common tern (Sterna hirundo), common coot (Fulica atra), black-headed gull (Larus ridibundus). Sequence analysis of the isolates showed that they belonged to the Asian HPAI virus H5N1 lineage, clade 2.3.2.1, and had close similarity with previous Russian H5N1 virus isolates of years 2014-2015.

Measures applied

• Control of wildlife reservoirs
• Screening
• No vaccination
• No treatment of affected animals

Measures to be applied

• No other measures

Laboratory name and type

All-Russian Research Institute for Animal Health (FGBI-ARRIAH) ( National laboratory )

Tests and results