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Registros recuperados: 12
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A coronavirus detected in the vampire bat Desmodus rotundus BJID
Brandão,Paulo Eduardo; Scheffer,Karin; Villarreal,Laura Yaneth; Achkar,Samira; Oliveira,Rafael de Novaes; Fahl,Willian de Oliveira; Castilho,Juliana Galera; Kotait,Ivanete; Richtzenhain,Leonardo José.
This article reports on the identification of a group 2 coronavirus (BatCoV DR/2007) in a Desmodus rotundus vampire bat in Brazil. Phylogenetic analysis of ORF1b revealed that BatCoV DR/2007 originates from a unique lineage in the archetypical group 2 coronaviruses, as described for bat species elsewhere with putative importance in Public Health.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coronavirus; Vampire bat; RNA-dependent; RNA-polymerase.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702008000600003
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Could human coronavirus OC43 have co-evolved with early humans? Genet. Mol. Biol.
Brandão,Paulo Eduardo.
Abstract This paper reports on an investigation of the role of codon usage evolution on the suggested bovine-to-human spillover of Bovine coronavirus (BCoV), an enteric/respiratory virus of cattle, resulting in the emergence of the exclusively respiratory Human coronavirus OC43 (HCoV-OC43). Analyses based on full genomes of BCoV and HCoV-OC43 and on both human and bovine mRNAs sequences of cholecystokinin (CCK) and surfactant protein 1 A (SFTP1-A), representing the enteric and respiratory tract codon usage, respectively, have shown natural selection leading to optimization or deoptimization of viral codon usage to the human enteric and respiratory tracts depending on the virus genes under consideration. A higher correlation was found for the nucleotide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Codon usage; Coronavirus; Spillover; Coevolution.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000400692
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Detection of Coronavirus in Capybaras (Hydrochoeris hydrochaeris) by Transmission Electron Microscopy in São Paulo, Brazil International Journal of Morphology
Catroxo,M. H. B; Miranda,L.B; Lavorenti,A; Petrella,S; Melo,N. A; Martins,A. M. C. P. R. F.
Coronaviruses are enveloped, positive-stranded RNA, belongs to the Nidovirales order, Coronaviridae family and are classified into three groups. Groups 3a and 3c comprising the avian coronaviruses. They are worldwide in distribution and can cause respiratory, enteric and in some cases hepatitis and neurological diseases in a wide variety of animals, resulting in economic losses to breeders and breeding. In this study, we describe an outbreak of diarrhea in a herd of capybaras found in the city of Piracicaba, São Paulo, Brazil. The animals had sudden symptoms of anorexia, profuse and watery diarrhea, yellowish or greenish, dehydration, weight loss, sharp and twisting of limbs leading to death in less than a week, mostly weaned and with an age of three...
Tipo: Journal article Palavras-chave: Coronavirus; Capybaras; Transmission electron microscopy.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000200035
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Diagnosis to Detect Porcine Transmissible Gastroenteritis Virus (TGEV) by Optical and Transmission Electron Microscopy Techniques International Journal of Morphology
Martins,A. M. C. R. P. F; Bersano,J. G; Ogata,R; Amante,G; Nastari,B. D. B; Catroxo,M. H. B.
The porcine transmissible gastroenteritis is a highly severe contagious disease, caused by virus of the Coronaviridae family, genus Coronavirus. Its epizootic shape can reach a rate of up to 100% mortality in piglets under two weeks of age as a result of severe dehydration. In this study fragments of small intestine and stool samples were collected from 75 autopsied pigs from properties. The samples of the fragments were frozen and sent to the Laboratory of Electron Microscopy, Instituto Biológico, SP, Brazil, for histological and transmission electron microscopic analyses. According to histological H&E technique, atrophy, villous necrosis and destruction of the enterocytes were observed in 35 (46.6%) out of the 75 fragments of the small intestine...
Tipo: Journal article Palavras-chave: Porcine Transmissible Gastroenteritis; Coronavirus; Histopathology; Transmission Electron Microscopy.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200059
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Identification of turkey astrovirus and turkey coronavirus in an outbreak of Poult Enteritis and Mortality Syndrome Rev. Bras. Ciênc. Avic.
Villarreal,LYB; Assayag,MS; Brandão,PE; Chacón,JLV; Bunger,AND; Astolfi-Ferreira,CS; Gomes,CR; Jones,RC; Ferreira,AJP.
This article reports a survey on turkey astrovirus (TAstV) and turkey coronavirus (TCoV) infections with RT-PCR in 17 turkey flocks affected by acute enteritis and two apparently normal turkey flocks located in the Southeastern region of Brazil by PCR (TAstV and TCoV). Seven out of the 17 affected flocks were positive for TAstV and 14 for TCoV, with seven co-infections. In one of the two apparently normal flocks, a TAstV-TCoV co-infection was found. Although a definitive association of these agents and the signs can not be made, the implications of these findings are discussed.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Astrovirus; Coronavirus; Turkey; Enteritis; Diagnosis.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000200010
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Infectious bronchitis virus: dominance of ArkDPI-type strains in the United States broiler industry during the last decade Rev. Bras. Ciênc. Avic.
Toro,H.
In the United States, more than 90% of chicken meat is produced in the southeastern states, and most egg production resides in the eastern half of the country and Texas. Several molecular epidemiological studies have indicated that most infectious bronchitis (IB) virus (IBV) isolates obtained from outbreaks of respiratory disease in these regions correspond to Ark-type IBV in spite of extensive vaccination programs which include IBV ArkDPI-derived vaccines. Accumulating evidence suggests that Ark-type strains may have a distinct capacity to circumvent preventive measures. Two strategies by which Ark-type IBV strains may maintain a high prevalence in commercial chickens are: (1) Unusually high genetic and phenotypic variability, and (2) synergism with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ark; Arkansas; Chicken; Coronavirus; Infectious Bronchitis Virus.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000200002
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Molecular epidemiology and evolution of avian infectious bronchitis virus Rev. Bras. Ciênc. Avic.
Montassier,HJ.
Mutation and recombination processes are involved in the genetic and phenotypic variations of RNA viruses, leading to the emergence of new variant strains, and give rise to virus population diversity to be modeled by the host, particularly by the immune system, as occurred with infectious bronchitis virus (IBV) in chickens. The consequence is a continuous emergence of new IBV variants with regard to pathotypes, serotypes, and protectotypes. Nucleotide sequencing and subsequent genetic analysis of the S1 and N protein gene sequences provide a fast and accurate method to classify and predict IBV genotype, and a powerful instrument to monitor phylogenetic and epidemiological evolution of IBV variants. Despite the use of vaccination programmes, infectious...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chicken; Coronavirus; Genetic evolution; Mutation; Prophylaxis; Recombination; Variant strains.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000200003
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Phylogeny of canine coronavirus (CCoV) from Brazilian dogs based on membrane protein partial sequences Arq. Bras. Med. Vet. Zootec.
Guirao,M.P.; Souza,S.P.; Jerez,J.A.; Richtzenhain,L.J.; Brandão,P.E..
Este artigo descreve a anteriormente desconhecida diversidade molecular de amostras brasileiras de Coronavírus canino (CCoV). Vinte e duas amostras foram submetidas à análise da sequência parcial do gene codificador da proteína de membrana, sendo 12 classificadas como CCoV Tipo II e 10 como CCoV Tipo I e uma possível sublinhagem tipicamente brasileira foi encontrada para o CCoV Tipo II.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coronavirus; Dogs; Phylogeny; Membrane; Brazil.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000600042
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Research of Viral Agent in Free-living Pigeon Feces (Columba livia) in the City of São Paulo, SP, Brazil, for Transmission Electron Microscopy International Journal of Morphology
Catroxo,M. H. B; Martins,A. M. C. R. P. F; Petrella,S; Curi,N. A; Melo,N.A.
The pigeon feces are vehicle of diseases both for humans and other animal species. In these birds, the most important viral diseases of the digestive tract are transmitted by the paramyxovirus, adenovirus and coronavirus. Avian paramyxoviruses have been isolated from a variety of species of free living and domestic birds worldwide, with several symptoms and clinical signs and economic losses. Paramyxoviruses belong to the Paramyxoviridae family and Avulovirus genus that includes nine serotypes (APMV 1 to 9). Avian adenoviruses belong to the Adenoviridae family and Aviadenovirus genus. In pigeons, cause classical adenovirosis and necrotizing hepatitis. The respiratory and enteric tracts are common targets of coronavirus. They belong to the Coronaviridae...
Tipo: Journal article Palavras-chave: Paramyxovirus; Adenovirus; Coronavirus; Pigeons; Transmission electron microscopy.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000200055
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Tracking viral particles in the intestinal contents of the American bullfrog, Lithobates catesbeianus, by Transmission Electron Microscopy Arq. Bras. Med. Vet. Zootec.
Antonucci,A.M.; Catroxo,M.H.; Hipolito,M.; Takemoto,R.M.; Melo,N.A.; França,F.M.; Teixeira,P.C.; Ferreira,C.M..
Feces are an important viral agent elimination route for infected carrier animals and in aquatic organisms these pathogenic agents can very rapidly propagate due to the habitation environment. The objective of this work is to track viral particles in the intestinal contents of bullfrogs (Lithobates catesbeianus) from five commercial frog farms in the region of Vale do Paraíba, in the State of São Paulo, Brazil, using negative contrast transmission electron microscopy (TEM). The Coronaviridae, Paramyxoviridae, Parvoviridae and Herpesviridae families were observed and photographed in specimens. This work emphasizes the importance of adopting sanitary measures in commercial farms and confirms that observing feces by TEM is an efficient and rapid diagnostic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amphibians; Herpesvirus; Coronavirus; Paramixovirus; Parvovirus.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000200001
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Viral Research in Brazilian Owls (Tyto alba and Rhinoptynx clamator) by Transmission Electron Microscopy International Journal of Morphology
Catroxo,M. H. B; Taniguchi,D. L; Melo,N. A; Milanelo,L; Petrella,S; Alves,M; Martins,A. M. C. R. P. F; Rebouças,M. M.
The barn-owl (Tyto Alba) and striped-owl (Rhinoptynx clamator) belong respectively to the families Tytonidae and Strigidae. Avian paramyxoviruses have been isolated from a variety of species of wild and domestic birds wordlwide causing diverse clinical symptoms and signs. Paramyxoviruses belong to the family Paramyxoviridae and Avulovirus genus, including nine serotypes (APMV 1 to 9). The lymphoid leukosis is a retrovirus-induced neoplasia. The avian retroviruses belong to the Retroviridae family and to the Alpharetrovirus genus. Coronaviruses can cause respiratory and enteric disease in several species of birds. They belong to the Coronaviridae family and to the groups 3a e 3c. In this study, we describe the presence of viruses in four owls, two barn owls...
Tipo: Journal article Palavras-chave: Paramyxovirus; Coronavirus; Retrovirus; Owls; Transmission electron microscopy.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000200047
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Winter dysentery in cows associated with Bovine Coronavirus (BCoV) Arq. Bras. Med. Vet. Zootec.
Brandão,P.E.; Gregori,F.; Sforsin,A.J.; Villarreal,L.Y.B.; Jerez,J.A..
Descreve-se a pesquisa de BCoV e rotavírus em 13 mostras fecais de vacas de surtos de disenteria utilizando uma nested PCR dirigida ao gene RdRp e PAGE, respectivamente. Todas as amostras fecais foram positivas para BCoV e nenhuma delas apresentou-se positiva para rotavírus em PAGE. O encontro de coronavírus bovino em amostras fecais de vacas com disenteria sugere que este vírus possa ser o agente primário envolvido na etiologia dos casos aqui relatados.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Bovine; Winter dysentery; Coronavirus; PCR; Diagnosis.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000400038
Registros recuperados: 12
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