OIE: Highly pathogenic avian influenza, Russia

Information received on 16/08/2018 from Dr Nikolay Vlasov, Deputy Head of the Rosselkhoznadzor, Ministry of Agriculture, Ministry of Agriculture, Moscow, Russia

Summary

Report type	Immediate notification
Date of start of the event	09/08/2018
Date of confirmation of the event	11/08/2018
Report date	16/08/2018
Date submitted to OIE	16/08/2018
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	13/03/2018
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5N2
Nature of diagnosis	Clinical, Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

Kostromskaya Oblast ( Harino, Kostromskoy )

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Birds	498485	506	506	1223

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	0.10%	0.10%	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

The virus isolate was identified as H5N2 subtype by PCR and nucleotide sequencing. The comparative analysis of the obtained nucleotide sequences of the H gene and N gene fragments revealed that the isolate belongs to the Asian genetic lineage of highly pathogenic avian influenza (Clade 2.3.4.4.) which spread in the Russian Federation as well as in Asian, European, Middle Eastern and African countries in 2016-2018. The hemagglutinin cleavage site has a –REKRRKRGLF- structure, characterizing the virus as potentially highly virulent.

Control measures

Measures applied	Movement control inside the country Surveillance within containment and/or protection zone Screening Quarantine Official disposal of carcasses, by-products and waste Stamping out Control of wildlife reservoirs Disinfection Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

All-Russian Research Institute for Animal Health ( OIE Reference Laboratory )

Tests and results

Species	Test	Test date	Result
Birds	reverse transcription - polymerase chain reaction (RT-PCR)	11/08/2018	Positive

Future Reporting

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