Detalhes bibliográficos
| Ano de defesa: |
2021 |
| Autor(a) principal: |
Brasileiro, Júlio César Lopes
 |
| Orientador(a): |
Mascarenhas, Alessandra Gimenez
|
| Banca de defesa: |
Leandro, Nadja Susana Mogyca,
Leite, Paulo Ricardo de Sá da Costa,
Mascarenhas, Alessandra Gimenez |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Zootecnia (EVZ)
|
| Departamento: |
Escola de Veterinária e Zootecnia - EVZ (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/11491
|
Resumo: |
The use of antibiotics in animal feed is increasingly a reason for questioning and discussion with the focus on food safety and the possibility of the emergence of bacterial resistance that may reflect on human therapy. Alternatives have been researched to replace the use of antibiotics in animal production with additives considered more innocuous, especially probiotics. Thus, to evaluate the use of probiotic associated or not with the presence of performance-enhancing antibiotic, 1400 one-day-old male Cobb-500® chicks were distributed in a completely randomized design (DIC) in a 2 x 2 factorial scheme totaling four treatments and ten repetitions including 35 birds in each plot covering the 42-day experimental period. Avilamycin was used as a performance-enhancing antibiotic and the variables studied in the present study included the zootechnical performance index, carcass yield and intestinal histomorphometry. For the variable of zootechnical performance index in the period of one to 21 days, an effect of the use of probiotic for feed conversion was observed, with the birds that received the probiotic presented a better conversion index when compared to the group of birds that did not receive addition. of probiotic and antibiotic in diets. For the intestinal histomorphometry parameter, the interaction between factors was observed, in which the group of birds that consumed the antibiotic-free diet and included with the probiotic presented better villus height concomitant to the villus: crypt in the duodenum ratio and better villus height concomitant to the depth of crypts in the ileum, demonstrating to be a viable alternative of substitution against the antibiotics used in the poultry farming. |
