Consulta: subjectFacets:"Avian encephalomyelitis"
Registros recuperados: 2
Data/hora: 15/06/2024 10:09:39

Severe Outbreak of Avian Encephalomyelitis in Laying Hens in Northeastern Brazil
Provedor de dados: 89
Autores: Rocha,PMC; Barros,MEG; Rocha,BP; Souza,FAL; Mendonça,FS; Evêncio-Neto,J.
ABSTRACT This paper describes the epidemiological, clinical and pathological aspects of an avian encephalomyelitis (AE) outbreak in commercial laying hens in Northeastern Brazil. The disease affected 23,409 layers (from day one until 100 weeks) leading to mortality of 16.5% (5,049/30,600) of the flock. Twenty laying hens were clinically examined, and blood samples were collected and tested by Enzyme-Linked Immunosorbent Assay (ELISA). Five laying hens with neurological signs were necropsied and samples of the brain, cerebellum, spinal cord, sciatic nerve, heart, ceca tonsils, proventriculus and liver were collected, fixed in formalin buffered solution and processed according to routine methods for histological examination. Clinical signs were observed in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avian encephalomyelitis; Birds; Laying hens; Nonsuppurative encephalomyelitis; Vaccination.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200305

Feeding different levels of vitamin E and selenium has no effect on serum immunoglobulin Y (IgY) production by layers vaccinated against Escherichia coli and avian encephalomyelitis virus
Provedor de dados: 65
Autores: Kindlein,Giselle; Ribeiro,Andréa Machado Leal; Canal,Cláudio Wageck; Vieira,Maitê de Moraes.
The effects of vitamin E and selenium (Se) supplementation on the immunity of hens vaccinated against a mixture of six swine-pathogenic Escherichia coli (EC) and avian encephalomyelitis virus (AEV) were studied. Antibody production (AbP) was evaluated in ninety 49 to 57-week-old H&amp;N Nick Chick hens fed diets containing 14IU Vitamin E kg-1 (basal diet), 27, 59, 111, or 111IU vitamin E kg-1 + 0.56ppm Se supplementation. At 51 wks of age, half of the hens were vaccinated against EC, and all birds were vaccinated against AEV. At 53-weeks of age, the birds received a second dose of EC vaccine. Blood samples were collected weekly and serum was analyzed by ELISA for anti-EC IgY and was expressed as optical density (OD). Vaccinated hens had higher serum OD...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avian encephalomyelitis; Escherichia coli; Immunoglobulin; Selenium; Vitamin E.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000500024