Summary
Report type: immediate notification
Started: 28 May 2021
Confirmed: 10 Jun 2021
Reported: 23 Jun 2021
Reason for notification: recurrence
Last occurrence: 4 Aug 2010
Causal agent: Highly pathogenic avian influenza virus
Serotype: H5
Nature of diagnosis: laboratory
This event pertains to a defined zone within the country.

New outbreaks (2)
Summary of outbreaks
Total outbreaks (2)
Outbreak location 1: Ubsu-Nur, Ovyurskiy rayon, Tuva
Started: 29 May 2021
Epidemiological unit: Not applicable
Total animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered or killed for commercial use / Vaccinated
Black-headed Gull (_Larus ridibundus_): Laridae-Charadriiformes/ - / 3
/ 0 / 3 / 0 / 0
Great Crested Grebe (_Podiceps cristatus_):
Podicipedidae-Procellariiformes/ - / 2 / 0 / 2 / 0 / 0
Great Cormorant (_Phalacrocorax carbo_):
Phalacrocoracidae-Trogoniformes/ - / 2 / 0 / 2 / 0 / 0

Outbreak location 2: Beloe, Piy-Khemskiy rayon, Tuva
Started: 29 May 2021
Epidemiological unit: Not applicable
Total animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered or killed for commercial use / Vaccinated
Little Grebe (_Tachybaptus ruficollis_):
Podicipedidae-Procellariiformes / - / 3 / 0 / 3 / 0 / 0
Tufted Duck (_Aythya fuligula_): Anatidae-Anseriformes / - / 1 / 0 / 1
/ 0 / 0
Black-headed Gull (_Larus ridibundus_): Laridae-Charadriiformes / - /
1 / 0 / 1 / 0 / 0
Common Pochard (_Aythya ferina_): Anatidae-Anseriformes / - / 2 / 0 /
2 / 0 / 0

Epidemiology
Source of the outbreak(s) or origin of infection: unknown or
inconclusive

Epidemiological comments: As part of the active monitoring of avian
influenza conducted in the Russian federation from 23 May to 29 May
2021 in the republic of Tuva (scientific expedition), samples were
collected from wild birds for laboratory testing at the Federal
State-Financed Budgetary Institution "ARRIAH". Wild birds were
clinically healthy and die-off was not reported in birds. Samples were
taken in the republic of Tuva: Ovyursky Raion, Uvs Lake, Piy-Khemsky
Raion, Beloye Lake and Kyzylsky Raion. The total number of samples
taken was 125. Samples taken from wild birds in Kyzylsky Raion tested
negative for AI virus.
A total of 7 samples taken in Piy-Khemsky Raion, Beloye Lake tested
positive for H5 and among them 3 samples tested positive for Н5N8,
the material was taken from birds of such species as: (_Aythya
ferina_) - 2, pos. A/H5; (_Larus ridibundus_) - 1, pos. A/H5; (_Aythya
fuligula_) - 1 pos. A/H5, (_Podiceps ruficollis_) - 3, pos. A/H5N8.
A total of 7 samples taken in Ovyursky Raion, Uvs Lake tested
positive for Н5, the material was taken from birds of such species
as: (_Phalacrocorax carbo_) - 2, pos. A/H5; (_Podiceps cristatus_) -
2- pos. A/H5; (_Larus ridibundus_) - 3- pos. A/H5.

Control measures applied in wild: surveillance within containment and
or the protection zone; screening; disinfection

Diagnostic test results
Laboratory name and type / Species / Outbreaks / Test / Test date /
Result
All-Russian Research Institute for Animal Health (FGBI-ARRIAH) OIE
Reference Laboratory/ Little Grebe, Great Crested Grebe, Great
Cormorant, Common Pochard, Black-headed Gull, Tufted Duck/ 2 /
Polymerase chain reaction (PCR) // Positive