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Severe Outbreak of Avian Encephalomyelitis in Laying Hens in Northeastern Brazil Rev. Bras. Ciênc. Avic.
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
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