Investigation of influenza in migrating birds, the primordial reservoir and transmitters of influenza in Brazil

Brazilian Journal of Microbiology

Adélia Hiroko Nagamori Kawamoto²  Dalva Assunção Portari Mancini²  Luiz Eloy Pereira¹  Aurora Marques Cianciarullo¹  Aurea Silveira Cruz¹  Andrea Luppi Fernandes Dias²  Rita Maria Zucatelli Mendonça²  José Ricardo Pinto²  Edison Luiz Durigon¹ 

[1] ,Instituto Butantan

关键词: migrating birds;    Brazilian avian influenza virus;    aves migratórias;    vírus da influenza em aves brasileiras;   

DOI  :  10.1590/S1517-83822005000100017

来源: SciELO

【 摘 要 】

Birds are the most important reservoirs of the influenza virus. Its maintenance in its natural hosts, including man, allows the influenza virus to reassorts its strains. The recent report of an avian influenza A (H5N1) virus in humans, was in a child with fatal respiratory illness in China, 1997. The current study was conducted to elucidate the transportation of the influenza by birds that migrate, annually, through the both Northern and Southern hemispheres, with special attention paid to the Vireo olivaceus [Juruviara(BR) or Red-eyed vireo(USA)] species, which travels from the USA to Brazil, and vice versa, and the Elaenia mesoleuca [Tuque(BR) or (USA)] species that flies over the entire Southern Hemisphere. There are two species of birds, which breed and migrate in São Paulo State, Brazil, and which were demonstrated to carry Influenza virus, were selected. The viral particles isolated were observed by electron microscopy. The influenza virus was detected by the House Duplex/PCR and Gloria molecular biology tests. The results demonstrated that the Elaenia mesoleuca and Vireo olivaceus bird species are carrying the Influenza virus whilst crossing both the Northern and Southern hemispheres. To understand the role that these migrating birds may play in epidemic influenza, in Brazil, characterization of avian influenza subtypes will be done.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License