Thesis (Ph. D.)--Texas A & M University, 2005. / "Major Subject: Poultry Science." Title from author supplied metadata (automated record created on Nov., 09:45:50.). Vita. Abstract. Includes bibliographical references.

Thesis (M.S.)--Ohio State University, 1975. / Bibliography: leaves 50-57. Available online via OhioLINK's ETD Center.

Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains v, 46 p. : col. ill. Includes abstract. Includes bibliographical references.

Thesis (M.S.)--Ohio State University, 1985. / Includes bibliographical references (leaves 89-91). Available online via OhioLINK's ETD Center

Thesis (Ph. D.)--Texas A&M University, 2006. / "Major Subject: Poultry Science" Title from author supplied metadata (automated record created on Apr. 27, 2007.) Vita. Abstract. Includes bibliographical references.

Thesis (M. S.)--Texas A&M University, 2005. / "Major Subject: Poultry Science" Title from author supplied metadata (automated record created on Apr. 27, 2007.) Vita. Abstract. Includes bibliographical references.

Thesis (Ph. D.)--Texas A&M University, 2005. / "Major Subject: Poultry Science" Title from author supplied metadata (automated record created on Apr. 27, 2007.) Vita. Abstract. Includes bibliographical references.

Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2007. / Singhose, William, Committee Member ; Lee, Kok-Meng, Committee Chair ; Webster, A. Bruce, Committee Member.

(1). In this thesis the relationship between eggshell quality and bone biology was examined over the laying life of two strains of hen; a highly selected commercial line and the relatively unselected J.Line. (2). The efficiency of using osteocalcin as a marker of osteoid formation, in collaboration with established markers of bone mineralisation and bone resorption, during eggshell calcification was ratified. (3). It was established that magnesium is actively removed from bone hydroxyapatite during resorption and transported to the shell gland pouch for incorporation into the palisade layer of the eggshell. (4). A relationship was demonstrated between hatched eggshell quality and the bone biology of newly hatched chicks. (5). The association between high egg output and poor bone structure was evident in the commercial laying strain hen. No such deficit in skeletal quality occurred in the relatively unselected J.Line. (6). The commercial line demonstrated a significantly higher rate of bone remodelling at late lay concomitant with osteoporosis. (7). The unselected J.Line demonstrated significantly higher rates of bone remodelling throughout lay. It was hypothesised that this was due to a greater propensity for bone upkeep during the inter-egg interval. (8). The provision of a prelay diet influenced neither bone volume nor mineral composition at the beginning of lay. (9). The feeding of a prelay diet led to a longer period of sustained high production and an earlier increase in egg weight. This was accompanied by a delay in the increase in osteoid formation and decreased levels of blood ionised calcium. This led to high "on farm" seconds at late lay due to abnormally high fracture toughness and the Incidence of type B's within the mammillary layer. (10). The reason for the observed decrease in hatchability associated with poorly pigmented eggshells in a commercial guinea fowl flock was related to premature expulsion of the egg. These thinner shelled eggs may have resulted from the process of artificial insemination.

Made available in DSpace on 2014-06-11T19:23:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2003Bitstream added on 2014-06-13T19:51:01Z : No. of bitstreams: 1 barros_mr_me_botfmvz.pdf: 1922025 bytes, checksum: a9234f32614518b9eccd2d82de578880 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / A colonização da mucosa intestinal por grande e diversificado número de bactérias é achado normal no homem e nos animais, incluindo as aves. Produtos de exclusão competitiva e/ou probióticos quando administrados às aves, devem promover a redução na colonização de patógenos potencialmente perigosos à saúde avícola e humana, como bactérias do gênero Salmonella e conseqüente equilíbrio na microbiota intestinal normal. O presente trabalho teve por objetivos verificar a presença de Lactobacillus spp. na microbiota do inglúvio e cecos de aves, identificar as espécies através dos métodos PCR e bioquímico e avaliar a capacidade da atividade inibitória in vitro das espécies isoladas frente a oito sorotipos de Salmonella. Utilizou-se aves reprodutoras e de postura comercial como doadoras de inglúvio e cecos para o isolamento e identificação de Lactobacillus. As amostras isoladas foram caracterizadas como pertencentes ao gênero Lactobacillus através dos testes de coloração de Gram positiva, catalase negativa, produção de gás em glicose e H2S em Tríplice Sugar Iron (TSI) negativo. Posteriormente, submetidas ao padrão de fermentação dos carboidratos e a PCR, para identificação das espécies de Lactobacillus. O método da PCR apresentou-se mais sensível mostrando resultados diferentes do método bioquímico. No bioquímico identificou-se L. acidophilus, L. fermentum, L. reuteri, L. salivarius e L. sp., enquanto na PCR, L. reuteri, L. salivarius e L. sp. Todas as espécies de Lactobacillus isoladas do inglúvio e cecos de aves apresentaram amostras que inibiram Salmonella Enteritidis fagotipo 4, S. Enteritidis fagotipo 28, S.Typhimurium, S. Pullorum, S. Agona, S. Anatum, S. Dublin e S. Senftenberg. Palavras chaves: Identificação, Lactobacillus, PCR, inibição, Salmonella, aves. / Intestinal mucosa colonization by a diverse and great number of bacteria is considered normal among men and animals including poultry. Competitive exclusion products and \or probiotics when given to poultry should promote pathogen colonization reduction which is potentially danger to human and poultry health like Salmonella and consequently a balance on normal intestinal microbiota The present work aimed at verifying Lactobacillus spp on crop microbiota and poultry cecum, identifying species through PCR and biochemical methods and to evaluate in vitro inhibitory activity ability from species isolated against eight Salmonella serotypes Production delivery and reproduction poultry were used as crop and cecum donors to isolate and identify Lactobacillus. Isolated samples were characterized as belonging to Lactobacillus species through coloration gram positive tests, negative catalase, glucose gas production and H2S in negative triple sugar iron (TSI). Afterwards, samples were subjected to carbohydrate fermentation pattern and to PCR to identify Lactobacillus species. PCR method has shown to be more sensitive presenting different results of biochemical methods. On biochemical method one identified: L. acidophilus, L. fermentum, L. reuteri, L. salivarius, and L. sp, while in PCR, L. reuteri, L. salivarius and L.sp. All Lactobacillus species isolated from poultry crop and cecum showed samples which inhibited Salmonella Enteritidis fagotype 4, S. Enteritidis fagotype 28, S.Typhimurium, S. Pullorum, S. Agona, S. Anatum, S. Dublin and S. Senftenberg.