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Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Santos,FC dos; Brandão,MDM; Silva,CC da; Machado,LS; Soares,MV; Barreto,ML; Nascimento,ER do; Pereira,VLA.
A farm with 3,000 free-range hens between 24 and 65 weeks of age was investigated. These hens were separated in small flocks of 400 to 700 birds, presenting 10 to 23% egg production reduction. Twenty serum samples were collected during the period of drop in egg production and three weeks later for the investigation of Mycoplasma synoviae (MS), M. gallisepticum (MG) and Infectious Bronchitis Virus (IBV) antibodies using ELISA. At the time of the second collection, egg production had resumed to normal levels; however, with 10.23% of the eggs showed eggshell abnormalities limited to the apex. Eggshell strength was significantly different between normal and those with eggshell apex abnormalities, but not other egg-quality parameters. ELISA tests showed that MS...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eggs; Mycoplasm; Egg defects; Egg abnormality; Economic loss.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200015