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Registros recuperados: 6
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An Overview on Marek’s Disease Virus Evolution and Evidence for Increased Virulence in Brazil Rev. Bras. Ciênc. Avic.
Torres,ACD; Marin,SY; Costa,CS; Martins,NRS.
ABSTRACT Marek’s disease virus (MDV) has been shown to be evolving to higher virulence. One of the genetic sites involved in virulence which enables such characterization is the 339-amino acid Meq protein encoding gene (meq). The reemergence of clinical Marek’s disease (MD) in vaccinated flocks can be associated to changes in meq. Our studies have shown the presence of very virulent MDV strains in the Brazilian industrial and free-range poultry. We present an overview of MD increasing severity and indicate the necessity of using phylogenetic tools for best accompanying MDV evolution.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gallid herpesvirus 2; Marek’s disease virus; Gallus gallus domesticus; Meq gene; Virulence.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100325
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Detection of Mycoplasma gallisepticum in dead captive psittacines in Belo Horizonte, Brazil Rev. Bras. Ciênc. Avic.
Gomes,AM; Costa,LL; Vilela,DAR; Marques,MVR; Carvalhaes,AG; Marin,SY; Costa,MP; Horta,RS; Resende,JS; Martins,NRS.
Mycoplasma gallisepticum (Mg) infection of wild native Brazilian psittacines (Psittaciformes) which died of any cause during sorting, rehabilitation, or conservation, was investigated by PCR. Two previously described PCR methodologies using Mg specific primers were employed for the analyses of 140 swab samples (cloaca, trachea, or palatine cleft). Average positive Mg detection in cloacal swabs was 51.9%, with 80.0% (n=5) of Blue-and-yellow Macaws (Ara ararauna), 60.0% (n=3) Dusky Parrots (Pionus fuscus), 52.5% (n=59) Amazon Parrots (Amazona aestiva), 50.0% (n=2) Orange-winged Parrots (Amazona amazonica), 50.0% (n=2) Jandaya Parakeetsor Jandaya Conures (Aratinga jandaya), 0% (n=2) Golden Conures or Golden Parakeets (Guarouba guarouba), and 0% (n=2) Hyacinth...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazona aestiva; Amazona amazonica; Anodorhynchus hyacinthinus; Aratinga jandaya; Brazilian psittacine fauna; Guarouba guarouba; Mycoplasma gallisepticum; PCR; Pionus fuscus; Psittaciformes; Psittacidae.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000200001
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Health assessment of raptors in triage in Belo Horizonte, MG, Brazil Rev. Bras. Ciênc. Avic.
Andery,D de A; Ferreira Junior,FC; Araújo,AV de; Vilela,DA da R; Marques,MVR; Marin,SY; Horta,RS; Ortiz,MC; Resende,JS de; Martins,NR da S.
Falconiformes (n=82), Strigiformes (n=84) and Cathartiformes (n=14) at a triage center (CETAS-Belo Horizonte, IBAMA, Brazil) were examined between 2008 and 2010 . No bird was reactive at hemagglutination-inhibition (HI) for antibodies against Mycoplasma gallisepticum (Mg). Two Caracara plancus (2/68) had HI titers (16-32) against Newcastle disease virus. No Chlamydophila psittaci DNA was detected in the liver (PCR; n=95). Blood smears (Giemsa; n=89) and spleen fragments (PCR; n=82) were 13.5% and 8.5% positive, respectively, for Haemoproteus only. Necropsy of Cathartiformes (n=10), Falconiformes (n=42) and Strigiformes (n=57) showed that trauma injuries were the main cause (63.3%) of admission and death, being fractures (38.5%) of the thoracic limbs...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cathartiformes health; Falcon; Falconiformes health; Hawk; Owl; Raptors; Strigiformes health; Vulture.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300012
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Serological Diagnosis of Influenza A Subtype H1 on Family Poultry of Belo Horizonte, Minas Gerais and Santa Maria, Rio Grande Do Sul, in Brazil. Rev. Bras. Ciênc. Avic.
Castro Filho,RPL; Torres,ACD; Marin,SY; Diniz,SA; Matos,JCC; Mureb,EN; Resende,M; Martins,NRS.
ABSTRACT Serum samples (n=687) from Gallus gallus domesticus were collected for the investigation of antibodies to avian influenza virus (AIV-A) in the family poultry of the surrounding counties of Santa Maria/RS and the metropolitan region of Belo Horizonte/MG, totaling twenty different counties. Additional samples of seventeen (n=17) free-flying ducks (C. moschata pure or hybrid with Anas platyrhynchos) were collected in Belo Horizonte. The chosen tests for the survey were performed as described by the World Organization for Animal Health (OIE), including agar gel immunodiffusion (AGID) for antibodies to AIV-A nucleoprotein (N) and haemagglutination- inhibition (HI) for antibodies to subtype H1. Out of the 704 serum tests performed by AGID, eight (8/704)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anas platyrhynchos; Avian influenza; Brazil; Cairina moschata; Family poultry; Gallus gallus domesticus; Serology.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400811
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Molecular Diagnosis of Beak and Feather Disease in Native Brazilian Psittacines Rev. Bras. Ciênc. Avic.
Araújo,AV; Andery,DA; Ferreira Jr.,FC; Ortiz,MC; Marques,MVR; Marin,SY; Vilela,DAR; Resende,JS; Resende,M; Donatti,RV; Martins,NRS.
ABSTRACT The incidence of the psittacine beak and feather disease virus (BFDV) was investigated in Brazilian native parrots with normal feathering arriving at rescue and triage centers for wild animals (CETAS, IBAMA) in the state of Minas Gerais, Brazil. BFDV DNA was investigated by previously described PCR technique for the partial amplification of BFDV ORF-1 in DNA extracts from blood, cloacal swab or liver of psittacines. Some birds provided more than one sample. Nine species of psittacines were sampled between January 2009 and October 2010. Blood (n=46) or cloacal swab (n=128) samples were obtained from psittacines immediately upon arrival at the triage centers. Liver samples were collected from necropsied birds dead on arrival (n=167). All swab...
Tipo: Info:eu-repo/semantics/article Palavras-chave: BFDV; Macaw; Parrot; Psittacine; Psittacine beak and feather disease.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400451
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Experimental Coinfection of Chicken Anemia Virus and Mycoplasma gallisepticum Vaccine Strains in Broiler Chicks Rev. Bras. Ciênc. Avic.
Prezotto,CF; Marin,SY; Araújo,TS; Barbosa,FO; Barrios,PR; Gomes,AM; Peconick,AP; Resende,M; Sousa,RV; Martins,NRS.
ABSTRACT This study aimed at determining the clinical and pathological effects of the coinfection of young SPF chickens with chicken anemia virus (CAV) and Mycoplasma gallisepticum (MG) vaccine strains. The clinical signs, gross and microscopic lesions were determined after the experimental coinfection broilers with a CAV genotype 1 vaccine strain given intraperitoneally on the first day of age and a MG F-strain vaccine given intranasally on the 8th day of age. The experimental groups included the negative control (group 1), a group infected with the MG F-strain vaccine (group 2), and a group coinfected with CAV and MG vaccines (group 3). Chicks were examined clinically and post mortem at 23 days of age, and gross and microscopic lesions of the trachea,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chicken; Chicken anemia virus; CAV; Mycoplasma gallisepticum; Coinfection.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300475
Registros recuperados: 6
Primeira ... 1 ... Última
 

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