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Master's Dissertation
DOI
10.11606/D.87.2016.tde-10032016-112402
Document
Author
Full name
Carla Meneguin Barbosa
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2015
Supervisor
Committee
Durigon, Edison Luiz (President)
Gregori, Fabio
Zanotto, Paolo Marinho de Andrade
Title in Portuguese
Coronavírus em aves silvestres e domésticas provinientes de diferentes regiões do Brasil.
Keywords in Portuguese
Aves domésticas
Aves migratórias
Aves silvestres
Biologia molecular
Brasil
Coronavírus
Abstract in Portuguese
Apesar de ainda não terem sido relatados Coronavírus aviários com potencial zoonótico, espécies de aves silvestres e domésticas podem portar CoVs de grande importância econômica como o vírus da Bronquite Infecciosa (IBV). Além disso, nos últimos anos, diversos novos CoVs geneticamente distintos do IBV vêm sendo identificados em diferentes famílias de aves e mamíferos silvestres e domésticos. O Brasil contem 18% do total da diversidade de espécies de aves no mundo, no entanto, estudos sobre a presença de Coronavírus em aves silvestres ainda são bastante escassos. O presente estudo tem por objetivo realizar análise retrospectiva da presença de Coronavírus em amostras de aves silvestres e domésticas de diferentes regiões brasileiras coletadas entre os anos de 2004 e 2013 através de RT-PCR; realizar a caracterização molecular e a análise filogenética afim de correlacionar sua epidemiologia às rotas de migrações de aves, à proximidade das regiões urbanas e de granjas avícolas, verificando a possibilidade de transmissão. Do total de 746 amostras testadas, 25 apresentaram resultados positivos para os Coronavírus com primers para o gene da RpRd e foram sequenciadas. Obtivemos sucesso no sequenciamento de 7 dessas amostras, sendo 4 positivas para Gammacoronavírus e 3 positivas para Deltacoronavírus. Na tentativa de sequenciamento do gene da proteína S uma galinha (Gallus gallus), da Ilha de Marajó-PA, mostrou sequência que foi identificada como uma cepa de IBV. Este trabalho é inédito no Brasil, pois demonstra a presença de Gamma e Deltacoronavírus aviários circulando em diversas regiões, próximo a áreas urbanas e indústrias avícolas, mostrando evidências de que aves silvestres podem carrear estes Coronavírus entre diferentes sítios migratórios no Brasil.
Title in English
Coronavirus in wild and domestic birds from different regions of Brazil.
Keywords in English
Brazil
Coronavirus
Domestic birds
Migratory birds
Molecular biology
Wild birds
Abstract in English
Regardless it has never been reported any avian Coronavirus with zoonotic potential, species of both wild and domestic birds can carry CoVs of great economic importance as the Infectious Bronchitis Virus (IBV). Furthermore, recently, many new CoVs, genetically distinct from IBV have been identified in different families of wild and domestic birds and mammals. Even though Brazil contains 18% of the bird species diversity in the world studies about the presence of Coronaviruses in wild birds are still quite scarce. This study aims to perform retrospective analysis of the presence of coronavirus in wild birds and domestic samples of different Brazilian regions collected between the years 2004 and 2013 by RT PCR and to perform molecular characterization and phylogenetic analysis in order to correlate its epidemiology to routes of bird migrations , the proximity of urban and poultry industry regions , verifying the possibility of transmission. Of the amount of 746 samples tested, 25 were positive for Coronavirus in PCR and nested PCR tests with primers for RpRd gene and were sequenced. We have succeeded in sequencing 7 of these samples which 4 were positive for Gammacoronavirus and 3 for Deltacoronavirus. In attempt of sequencing the S protein gene, we have succeeded in a chicken sample (Gallus gallus) from Ilha de Marajó-PA. This sample was identified as a strain of IBV. This work is unprecedented in Brazil, as it demonstrates the presence of Gamma and Deltacoronavirus in birds circulating in different regions, close to urban areas and poultry industries, showing evidence that wild birds may carry these Coronavirus between different migratory sites in Brazil.
 
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Release Date
2018-03-10
Publishing Date
2016-03-10
 
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