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Provedor de dados:  Rev. Bras. Ciênc. Avic.
País:  Brazil
Título:  Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil
Autores:  Santos,FC dos
Brandão,MDM
Silva,CC da
Machado,LS
Soares,MV
Barreto,ML
Nascimento,ER do
Pereira,VLA
Data:  2014-06-01
Ano:  2014
Palavras-chave:  Eggs
Mycoplasm
Egg defects
Egg abnormality
Economic loss
Resumo:  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 and IBV titers increased during the evaluated period. MS infection was confirmed by culture and by PCR of tracheal swabs. All samples were negative for MG by ELISA and PCR. Further studies with larger samples to ensure the occurrence of this disease in industrial layer flocks in Brazil are under way.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200015
Editor:  Fundação APINCO de Ciência e Tecnologia Avícolas
Relação:  10.1590/1516-635x1602101-104
Formato:  text/html
Fonte:  Brazilian Journal of Poultry Science v.16 n.2 2014
Direitos:  info:eu-repo/semantics/openAccess
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