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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2009.tde-02122009-085608
Document
Author
Full name
Amarilis Novaes D'Elboux Bünger
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2009
Supervisor
Committee
Ferreira, Antônio José Piantino (President)
Maiorka, Paulo César
Raso, Tânia de Freitas
Sinhorini, Idercio Luiz
Timenetsky, Jorge
Title in Portuguese
Detecção e caracterização molecular do gene 3 e 5 do coronavírus de perus (TCOV) isolados de perus com severa enterite no Brasil.
Keywords in Portuguese
Análise filogenética
Caracterização molecular
Coraonavírus de perus
Doenças
Enterite animal
Gene 3
Gene 5
Genética molecular
Microbiologia
RT-PCR
Abstract in Portuguese
O coronavírus de perus (TCoV) é o agente etiológico associado a síndrome de mortalidade entérica das aves (PEMS). PEMS é uma enfermidade entérica, aguda e altamente contagiosa dos perus caracterizada por depressão, anorexia, diarréia e alta mortalidade em lotes de perus comerciais. A presença do coronavírus de perus (TCov) foi pesquisada em 29 amostras de conteúdo intestinal de perus entre 10 e 104 dias de idade que apresentaram enterite severa no período de 2004 a 2006. A detecção do TcoV foi realizada realizada através da técnica da transcriptase reversa e da reação em cadeia pela polimerase (RT-PCR), mediante a amplificação da região 3 UTR, seguida pela amplificação dos genes 3 e 5. A caracterização molecular dos vírus foi realizada mediante a amplificação dos genes 3 e 5, que mostrou similaridade genética entre as amostras, mas diferenças com as sequencias dos outros TCoVs publicados previamente. Em relação ao gene 3, as amostras apresentaram maior relação com o vírus da bronquite infecciosa das aves (IBV), enquanto que com o gene 5 houve maior identidade com os cronavírus de faisão (PhCoV). Nossos resultados sugerem que a estratégia de amplificação da região 3 UTR provou ser uma estratégia eficaz para a detecção do TcoV em conteúdo intestinal.
Title in English
Detection and molecular characterization of gene 3 and 5 of turkey coronavirus (TCoV) from turkeys with severe enteritis in Brazil.
Keywords in English
Animal enteritis
Disease
Gene 3
Gene 5
Microbiology
Molecular characterization
Molecular genetics
Phylogenetic analysis
RT-PCR
Turkeys coronavirus
Abstract in English
Turkey coronavirus (TCoV) is causative agent associated to Poult Enteritis and Mortality Syndrome (PEMS) in turkeys wideworld. The disease is characterized by an acute highly contagious enteric disease of turkeys characterized by depression, anorexia, diarrhea and high mortality in co mMercial turkey flocks. The presence of turkey coronavirus (TCoV) in 29 intestinal content samples from turkey flocks aged between 10 and 104 days with severe enteritis was monitored in the period of 2004 to 2006. TCoV detection was accomplished by the reverse transcriptase-polymerase chain reaction (RT-PCR), through amplification of the 3´UTR region, followed by amplification of genes 3 and 5. Molecular characterization of the viruses was done through amplification of genes 3 and 5, and showed evidence of genetic similarity between them, although they differed of sequences of other TCoVs described in the literature. In relation to gene 3, samples showed greater relationship with chicken infectious bronchitis virus (IBV), and while gene 5 showed greater identity with pheasant coronavirus (PhCoV). Our results suggest that the strategy of amplification of the 3´UTR region has proved to an effective means of detection of TCoV in intestinal contents.
 
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Publishing Date
2010-03-02
 
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