Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil
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 t...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Fundação APINCO de Ciência e Tecnologia Avícolas
2014-06-01
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| Series: | Brazilian Journal of Poultry Science |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200015&lng=en&tlng=en |
| _version_ | 1818947620108763136 |
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| author | FC dos Santos MDM Brandão CC da Silva LS Machado MV Soares ML Barreto ER do Nascimento VLA Pereira |
| author_facet | FC dos Santos MDM Brandão CC da Silva LS Machado MV Soares ML Barreto ER do Nascimento VLA Pereira |
| author_sort | FC dos Santos |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-20T08:33:48Z |
| format | Article |
| id | doaj.art-12d9785774064fcca8dd4ffa545fd2c8 |
| institution | Directory Open Access Journal |
| issn | 1806-9061 |
| language | English |
| last_indexed | 2024-12-20T08:33:48Z |
| publishDate | 2014-06-01 |
| publisher | Fundação APINCO de Ciência e Tecnologia Avícolas |
| record_format | Article |
| series | Brazilian Journal of Poultry Science |
| spelling | doaj.art-12d9785774064fcca8dd4ffa545fd2c82022-12-21T19:46:36ZengFundação APINCO de Ciência e Tecnologia AvícolasBrazilian Journal of Poultry Science1806-90612014-06-0116210110310.1590/1516-635x1602101-104S1516-635X2014000200015Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, BrazilFC dos Santos0MDM Brandão1CC da Silva2LS Machado3MV Soares4ML Barreto5ER do Nascimento6VLA Pereira7Programa de Pós-graduação em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem AnimalPrograma de Pós-graduação em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem AnimalPrograma de Pós-graduação em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem AnimalPrograma de Pós-graduação em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem AnimalUniversidade Federal FluminenseUniversidade Federal FluminensePrograma de Pós-graduação em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem AnimalPrograma de Pós-graduação em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem AnimalA 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200015&lng=en&tlng=enEggsmycoplasmegg defectsegg abnormalityeconomic loss |
| spellingShingle | FC dos Santos MDM Brandão CC da Silva LS Machado MV Soares ML Barreto ER do Nascimento VLA Pereira Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil Brazilian Journal of Poultry Science Eggs mycoplasm egg defects egg abnormality economic loss |
| title | Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil |
| title_full | Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil |
| title_fullStr | Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil |
| title_full_unstemmed | Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil |
| title_short | Eggshell apex abnormalities in a free-range hen farm with mycoplasma synoviae and infectious bronchitis virus in Rio de Janeiro state, Brazil |
| title_sort | eggshell apex abnormalities in a free range hen farm with mycoplasma synoviae and infectious bronchitis virus in rio de janeiro state brazil |
| topic | Eggs mycoplasm egg defects egg abnormality economic loss |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200015&lng=en&tlng=en |
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