OIE: Highly pathogenic avian influenza ,Russia

Information received on 27/04/2015 from Dr Evgeny Nepoklonov, Deputy Head, Federal Service for Veterinary and Phytosanitary Surveillance, Ministry of Agriculture, Moscow, Russia

Summary

Report type

Immediate notification (Final report)

Date of start of the event

17/04/2015

Date of confirmation of the event

21/04/2015

Report date

27/04/2015

Date submitted to OIE

27/04/2015

Date event resolved

27/04/2015

Reason for notification

Reoccurrence of a listed disease

Date of previous occurrence

10/2014

Manifestation of disease

Sub-clinical infection

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

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

  • ASTRAKHANSKAYA OBLAST ( Makarkin, Ikryaninsky )

Total animals affected

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Dalmatian pelican:Pelecanidae (Pelecanus crispus)

5

5

0

0

Outbreak statistics

Species

Apparent morbidity rate

Apparent mortality rate

Apparent case fatality rate

Proportion susceptible animals lost*

Dalmatian pelican:Pelecanidae (Pelecanus crispus)

**

**

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

The comparative analysis of the obtained nucleotide sequences of the H gene 258 bp fragment showed that the tested isolates belonged to an Asian lineage of highly pathogenic avian influenza (lineage A/Guandong/1/96 lineage, clade 2.3.2.1).
Based on the H gene fragment nucleotide sequences the given isolates were the most similar to type A H5N1 highly pathogenic avian influenza virus isolates recovered in Altay krai in 2014 (98.83 % identity) and in Vietnam and China over the period from 2012 to 2014 (98.44-98.04% identity).
The hemagglutinin cleavage site of this virus includes several basic amino acids and has -RERRRKR- structure which allows this virus to be characterized as potentially highly virulent.

Control measures

Measures applied

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

Measures to be applied

  • No other measures

Diagnostic test results

Laboratory name and type

Government Budget Institution Astrakhan Oblast Veterinary Laboratory ( Local laboratory )

Tests and results

Species

Test

Test date

Result

Dalmatian pelican

polymerase chain reaction (PCR)

21/04/2015

Positive

Laboratory name and type

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

Tests and results

Species

Test

Test date

Result

Dalmatian pelican

gene sequencing

24/04/2015

Positive

Dalmatian pelican

haemagglutination inhibition test (HIT)

24/04/2015

Positive

Dalmatian pelican

real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)

24/04/2015

Positive

Dalmatian pelican

virus isolation

24/04/2015

Positive

Future Reporting

The event is resolved. No more reports will be submitted.