Avian influenza virus ecology in wild birds of Western Siberia

Abstract Background The aim of the study was to explore the ecological diversity of wild birds in Siberia, which are the natural reservoir of avian influenza virus (AIV). Methods Cloacal swabs and intestinal fragments were collected from wild migratory birds from 2007‒2014. Isolated viruses were gro...

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Bibliographic Details
Published in:Avian Research
Main Authors: K. A. Sharshov, A. K. Yurlov, Xinxin Li, Wen Wang, Laixing Li, Yuhai Bi, Wenjun Liu, Takehiko Saito, Haruko Ogawa, A. M. Shestopalov
Format: Article in Journal/Newspaper
Language:English
Published: BMC 2017
Subjects:
Influenza A virus
Wild birds
Water and wetland complex
Ecology
Migration
Distribution
Zoology
QL1-991
Shoveler
Siberia
Online Access:https://doi.org/10.1186/s40657-017-0070-9
https://doaj.org/article/dfe5d885df4d48818843bf2390dc60a4
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Summary:Abstract Background The aim of the study was to explore the ecological diversity of wild birds in Siberia, which are the natural reservoir of avian influenza virus (AIV). Methods Cloacal swabs and intestinal fragments were collected from wild migratory birds from 2007‒2014. Isolated viruses were grown in the allantoic cavity of embryonated chicken eggs. The presence of virus was determined using hemagglutination assays. Primary identification and subtyping of influenza viruses was confirmed by RT-PCR. Results A total of 2300 samples obtained from wild migratory birds of 8 orders were collected and tested. Influenza was detected in 185 birds of 3 orders. Species of family Anatidae (order Anseriformes) such as European Teal (Anas crecca), Garganey Teal (A. querquedula), and Shoveler (A. clypeata) play the main role in AIV circulation in the south of Western Siberia. The proportion of viral carriers among waterfowl ranged from 5.6 to 20% in 2007‒2014. The order Charadriiformes had lower virus isolation rates of not more than 1.4%. Conclusions Wild migratory waterfowl of orders Anseriformes and Charadriiformes are the main reservoir of AIV in the south of Western Siberia. This area plays a key role in persistence, evolution, and geographical distribution of avian influenza.

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