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Registros recuperados: 14
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An Outbreak of Intestinal Obstruction by Ascaridia Galli in Broilers in Minas Gerais Rev. Bras. Ciênc. Avic.
Torres,ACD; Costa,CS; Pinto,PN; Santos,HA; Amarante,AF; Gómez,SYM; Resende,M; Martins,NRS.
ABSTRACT Industrial broilers raised on helminthic medication-free feed were diagnosed with a severe disease caused by Ascaridia galli, characterized by intestinal hemorrhage and obstruction. A. galli was identified based on the morphological features of the nematode. Broilers were raised for a longer period (63 days) for weight recovery, grouped as stunted (n=500), had low body score and had fetid diarrhea. The duodenum-jejunum segment was the most severely affected with obstruction and had localized accumulation of gas. The intestinal mucosa was severely congested with petechial and suffusive hemorrhages. The outbreak resulted in morbidity of about 10% and mortality of up to 4% and was associated to the absence of preventive medication on feed and slack...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascaroidea; Broiler chicken; Nematode; Enteriitis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000400322
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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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Effect of maternally-derived antibodies on the performance and immunity of broilers induced by in ovo or post-hatching immunizations with a live vaccine against infectious bursal disease Rev. Bras. Ciênc. Avic.
Michell,BC; Gomes,AD; Baião,NC; Resende,M; Lara,LJC; Martins,NRS.
The interference of low or high maternal antibodies titers on the attenuated infectious bursal disease (IBD) virus (IBDV) vaccine infection and its effects on the performance of broilers vaccinated at the 18th day of incubation (in ovo), at one day of age (subcutaneously-SC), or at 15 days of age (drinking water-DW) were investigated. After a series of three live vaccinations, breeders were given or not an IBD oil emulsion vaccine (IBD-OEV) prior to sexual maturity. At day 18 of incubation (in ovo), a commercial vaccine containing HVT and an intermediate IBDV strain or the single HVT vaccine was given. An intermediate IBDV vaccine was given SC at one day of age, or at 15 days of age via DW. The progeny of unvaccinated breeders presented higher neutralizing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Attenuated IBDV; Attenuated IBDV neutralization; Broiler chicken; Infectious bursal disease; Infectious bursal disease virus; IBDV; In-ovo vaccination; Maternal antibody; RT-PCR; Serum neutralization; Vaccination versus performance.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100009
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Epididymal lithiasis in Gallus gallus domesticus Rev. Bras. Ciênc. Avic.
Rocha Jr.,JM; Mahecha,GAB; Dornas,RAP; Kuana,SL; Martins,NRS.
A study on the occurrence of epididymal lithiasis (EL) in Gallus gallus domesticus of different breeds and from different geographical regions of Brazil was carried out. Forty breeding roosters were collected in the states Santa Catarina, São Paulo, Minas Gerais, Espírito Santo and Goiás, representing two specific pathogen free Leghorn lines (SPF), one commercial Leghorn layer breeder (Hy-Line) line, two commercial broiler breeder lines (Ross and Cobb), and two backyard chicken flocks. In commercial poultry breeders, EL was observed mainly after 55 weeks of age, and lithus resulted in lower fertility caused by inadequate maturation of spermatozoa and testicular atrophy, which evolved to more severe testicular dysfunction at 100 weeks of age. One hundred...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Epididymal lithiasis; Gallus gallus domesticus; Infertility; Rooster; Testicular calculus.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100004
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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
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Histomorphological changes by epididymal lithiasis in roosters Rev. Bras. Ciênc. Avic.
Geraldo,I; Mahecha,GAB; Martins,NRS.
Epididymal lithiasis (EL) histopathology is described using light and electronic microscopy in roosters (Gallus gallus domesticus) naturally affected by EL in Minas Gerais, Brazil. The histologic and morphological changes by EL in roosters was performed regarding cellular and subcellular details through light and electron microscopy. Efferent ductules epithelium lysosomal increase in size and numbers, membrane rupture, cellular vacuolation, ciliary loss, basal membrane degeneration, inflammatory reaction with mononuclear infiltrations, edema, epithelial and vascular endothelium losses were described. All industrial and freerange chickens showed EL in varying degrees in the efferent ductules (ED). However, ED altered areas did not correlate with the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Epididymal lithiasis; Histopathology; Light microscopy; Electron microscopy; Gallus gallus domesticus; Infertility; Rooster; Testicular calculus.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100004
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Influenza Aviária: Uma Revisão dos Últimos Dez Anos Rev. Bras. Ciênc. Avic.
Martins,NRS.
A influenza aviária é doença exótica no Brasil. O sistema de vigilância implementado pelo Programa Nacional de Sanidade Avícola (PNSA) mantém monitoração permanente das aves das principais espécies domésticas, tanto do material genético importado para a indústria avícola, por exemplo, da espécie das galinhas (Gallus gallus formadomestica), perus (Meleagris gallopavo formadomestica), codornas (Coturnix coturnix japonica), patos (Anas), primários (elite), bisavós e avós para postura ou corte, como aves de espécies de exploração mais recente, exóticas, por exemplo avestruzes (Struthio camelus) ou nativas, por exemplo emas (Rhea americana). Os plantéis de reprodutores em produção são também acompanhados por amostragens periódicas, conforme previsto no PNSA,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Influenza aviária; Vírus; Aves (Aves); Frangos de corte; Vacina.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000200001
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Lead poisoning mortality in wild passeriformes and its detection in free-range chicken eggs in Southern Minas Gerais, Brazil Rev. Bras. Ciênc. Avic.
Martins,NRS; Marques,MVR; DAR,Vilela; Resende,JS; Carvalhaes,AG; Andrade,EAG; Barrios,PR.
The mortality of passerines native of Southern Minas Gerais, Brazil, in August 2006 and the examination of sentinel free-range chicken eggs in August 2007 in an area surrounding a car battery lead smelter plant is described. The high levels of lead, as detected in the passerines (4.80-12.74 mg/kg) at the onset of mortality and at the follow-up sampling of the free-range chicken eggs (25.02-35.21 mg/kg in shells, 0.41-1.36 mg/kg in yolks and 0.40-0.75 mg/kg in the albumins), used as environmental sentinels, indicated the continuing lead pollution.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Battery recycling; Car; Free-range chicken; Lead; Passerine.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300002
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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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Occurrence and Epidemiology of Fannia Spp. (Diptera: Fanniidae) in Laying Poultry Farms in State of Minas Gerais, Brazil Rev. Bras. Ciênc. Avic.
Rezende,LC; Oliveira,TM; Teixeira,CM; Oliveira,PR; Martins,NRS; Cunha,LM.
ABSTRACT Aspects related to epidemiology of flies belonging to Fannia genus were studied in order to determine predisposing factors for its occurrence in layer hens houses of commercial farms in the state of Minas Gerais, Brazil. An observational, analytical and sectional survey was conducted to verify major epidemiological aspects associated to infestations. This research was accomplished starting from an adapted secondary database of and structured with information on the presence and absence of ectoparasites and arthropods, characteristics of chicken houses, the poultry, type of facilities, geographical location and the management. The study was conducted in four hundred and thirty one houses located in forty three farms visited in 2012 year in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flies; Laying hens; Management of poultry manure.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300419
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Occurrence of chicken anemia virus in backyard chickens of the metropolitan region of Belo Horizonte, Minas Gerais Rev. Bras. Ciênc. Avic.
Barrios,PR; Marín,SY; Resende,M; Rios,RL; Resende,JS; Horta,RS; Costa,MP; Martins,NRS.
The occurrence of CAV in backyard chickens in the metropolitan area of Belo Horizonte, Brazil, was evaluated. The spleen and thymus of chickens from different origins were collected for DNA extraction and nested-PCR. CAV genome was detected in 30% of the flocks (n=20) examined. CAV origin for backyard chickens is speculated, taking into consideration its widespread incidence in the chicken industry, the contamination of live vaccines with CAV prior to its eradication from SPF flocks, and the use of attenuated CAV vaccines.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Backyard chickens; CAV; Chicken; Chicken infectious anemia virus.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200010
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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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Vertebral Osteomyelitis in Broilers: A Review Rev. Bras. Ciênc. Avic.
Braga,JFV; Martins,NRS; Ecco,R.
ABSTRACT Locomotor diseases are still a challenge in modern poultry. Vertebral osteomyelitis (VO) is an emerging disease in broilers worldwide. The inflammatory process in the affected thoracic vertebra (T4) and subsequent spinal cord compression leads to clinical signs related to locomotor impairment, inadequate feeding and drinking, and increased mortality in the affected flocks. The pathogenesis of the disease is poorly understood and Enterococcus cecorum is the bacterium most frequently associated with the disease. However, other bacteria such as E. faecalis, E. durans, Escherichia coli and Staphylococcus aureus have been recently detected in cases of the disease, raising questions regarding its etiopathogenesis. As many questions about VO in broilers...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial infections; Enterococcus spp.; Enterococcus cecorum; Locomotor diseases; Poultry.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300605
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