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| Torres,Cibele Araujo; Vieira,Sergio Luiz; Reis,Renata Nuernberg; Ferreira,André Klein; Silva,Pedro Xavier da; Furtado,Fulvio Vinicius Foch. |
| An experiment was carried out with the objective of evaluating the addition of 25-hydroxycholecalciferol (25(OH) D3) in diets of broiler breeder hens. The experiment used Cobb 500 broiler breeder hens and was allotted to a complete randomized design with four treatments and eight replications of twenty females and two males each. The treatments consisted of vitamin premixes with 2,000 and 3,400 IU/kg diet vitamin D3 as the only source of vitamin or 2,000 IU D3 plus 35 or 69 mg/t of 25(OH) D3. Results of this experiment indicated that 25(OH) D3 had no significant effect on egg production parameters from 32 to 67 weeks. The supplementation of 25(OH) D3 resulted in better quality egg shells evaluated by the specific gravity at 60 weeks of age, regardless of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 25-hydroxycholecalciferol; Breeder hens; Hatchability; Productive performance; Vitamin D. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700018 |
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| Rossi,Daise Aparecida; Fonseca,Belchiolina Beatriz; Melo,Roberta Torres de; Felipe,Gutembergue da Silva; Silva,Paulo Lourenço da; Mendonça,Eliane Pereira; Filgueiras,Ana Luzia Lauria; Beletti,Marcelo Emilio. |
| Campylobacter coli is an important species involved in human cases of enteritis, and chickens are carriers of the pathogen mainly in developing country. The current study aimed to evaluate the transmission of C. coli and its pathogenic effects in chicken embryos. Breeder hens were inoculated intra-esophageally with C. coli isolated from chickens, and their eggs and embryos were analyzed for the presence of bacteria using real-time PCR and plate culture. The viability of embryos was verified. In parallel, SPF eggs were inoculated with C. coli in the air sac; after incubation, the embryos were submitted to the same analysis as the embryos from breeder hens. In embryos and fertile eggs from breeder hens, the bacterium was only identified by molecular methods;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campylobacter coli; Viability; Transmission; Breeder hens. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200014 |
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