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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A comparison of methods of conducting the macroscopic agglutination test for determining Salmonella pullora infection in the domestic fowl

Van Roekel, Henry January 1926 (has links)
no abstract provided by author / Master of Science
2

A bacteriological study, with special reference to Bacterium pullorum, of chicks dead in shell and chicks dying within three weeks after hatching

Thorp, Frank January 1927 (has links)
M.S.
3

A bacteriological study, with special reference to Salmonella pullora, of eggs laid by hens reacting positively to the macroscopic agglutination test for Salmonella pullora

Van Roekel, H. January 1926 (has links)
Master of Science
4

Diferenciação molecular entre Salmonella enterica subsp enterica sorovar Pullorum e Salmonella enterica subsp enterica sorovar Gallinarum

Ribeiro, Simone Alves Mendes [UNESP] 15 February 2008 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:33:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-02-15Bitstream added on 2014-06-13T20:48:11Z : No. of bitstreams: 1 ribeiro_sam_dr_jabo.pdf: 714385 bytes, checksum: 8dea9f3890502c7e3fa86484716ab25e (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A Salmonella Pullorum (SP) é muito semelhante à Salmonella Gallinarum (SG), agentes da Pulorose e Tifo aviário, respectivamente, sendo responsáveis por perdas econômicas no setor avícola. São salmonelas de composição antigênica similar e a distinção de ambas tem sido baseada em provas bioquímicas. Entretanto, este procedimento é laborioso e o surgimento de estirpes com comportamento bioquímico atípico tem estimulado a procura por outros métodos de diagnóstico, como os testes moleculares. No presente estudo, analisou-se o método descrito na literatura envolvendo o gene rfbS em conjunto com testes desenvolvidos com base nos genes speC e speF. O gene rfbS codifica a enzima que atua na parede celular de bactérias e tem sido utilizado para diferenciar SP e SG. Com o propósito de padronizar a PCR para ser utilizada na rotina laboratorial, empregou-se dois métodos de extração de DNA e diferentes concentrações de reagentes. Entretanto, tendo em vista a dificuldade de padronização encontrada desde o início, foi concomitantemente desenvolvida a PCR para os genes speC e speF. Estes dois últimos estão relacionados com a produção da enzima ornitina-descarboxilase, a qual é ativa em SP e inativa em SG. Após testes inicias, foi possível padronizar a PCR do gene speC com posterior utilização da técnica de tratamento enzimático com a enzima de restrição Eco RI. Tanto para o gene rfbS quanto para os genes speC e speF, os resultados encontrados permitiram a diferenciação de 13 amostras de SP e 20 de SG isoladas no Brasil e duas cepas ATCC. Sendo assim, as ações sanitárias e a tomada de decisão no campo podem ser conduzidas de maneira rápida e segura. / Salmonella Pullorum (SP) is very similar to Salmonella Gallinarum (SG). They are respectively agents of Pulorosis and Avian Typhoid, both diseases responsible for economic losses to poultry production. Due to the fact that both salmonellas have similar antigenic composition, their differentiation has been based in biochemical tests. However, this fact that this kind of procedure is very troublesome and the occurence of strains showing atypical behavior have stimulated the search for others diagnostic methods, such as molecular tests. In the present study, a method described in the literature using gene rfbS was analyzed together with tests developed based on genes speC and speF. Gene rfbS encodes an enzyme that acts on the cell wall of bacteria and has been used in the differentiation between SP and SG. In order to standardize the PCR procedure to be used in laboratory routine, two methods for DNA extraction were used, as well as different concentrations of the reagents. However, due to the difficulty in the standardization observed from the beginning of the study, a PCR procedure was developed for genes speC and speF. These genes are related to the production of the enzyme ornithine-descarboxilase, active in SP and inactive in SG. After the initial tests, PCR of gene speC was standardized, and later on it was coupled with the enzymatic treatment with restriction enzyme Eco RI. Results obtained for gene rfbS as well as for genes speC and speF enabled differentiation of 13 SP and 20 SG strains isolated in Brazil and two strains ATCC. So, the sanitary actions and the decisions in the livestock can to be conduced with safety and rapidity.
5

Diferenciação molecular entre Salmonella enterica subsp enterica sorovar Pullorum e Salmonella enterica subsp enterica sorovar Gallinarum /

Ribeiro, Simone Alves Mendes. January 2008 (has links)
Orientador: Angelo Berchieri Junior / Banca: Fabiana Silva Lima / Banca: Ana Maria Iba Kanashiro / Banca: Oswaldo Durval Rossi Junior / Banca: Luiz Augusto do Amaral / Resumo: A Salmonella Pullorum (SP) é muito semelhante à Salmonella Gallinarum (SG), agentes da Pulorose e Tifo aviário, respectivamente, sendo responsáveis por perdas econômicas no setor avícola. São salmonelas de composição antigênica similar e a distinção de ambas tem sido baseada em provas bioquímicas. Entretanto, este procedimento é laborioso e o surgimento de estirpes com comportamento bioquímico atípico tem estimulado a procura por outros métodos de diagnóstico, como os testes moleculares. No presente estudo, analisou-se o método descrito na literatura envolvendo o gene rfbS em conjunto com testes desenvolvidos com base nos genes speC e speF. O gene rfbS codifica a enzima que atua na parede celular de bactérias e tem sido utilizado para diferenciar SP e SG. Com o propósito de padronizar a PCR para ser utilizada na rotina laboratorial, empregou-se dois métodos de extração de DNA e diferentes concentrações de reagentes. Entretanto, tendo em vista a dificuldade de padronização encontrada desde o início, foi concomitantemente desenvolvida a PCR para os genes speC e speF. Estes dois últimos estão relacionados com a produção da enzima ornitina-descarboxilase, a qual é ativa em SP e inativa em SG. Após testes inicias, foi possível padronizar a PCR do gene speC com posterior utilização da técnica de tratamento enzimático com a enzima de restrição Eco RI. Tanto para o gene rfbS quanto para os genes speC e speF, os resultados encontrados permitiram a diferenciação de 13 amostras de SP e 20 de SG isoladas no Brasil e duas cepas ATCC. Sendo assim, as ações sanitárias e a tomada de decisão no campo podem ser conduzidas de maneira rápida e segura. / Abstract: Salmonella Pullorum (SP) is very similar to Salmonella Gallinarum (SG). They are respectively agents of Pulorosis and Avian Typhoid, both diseases responsible for economic losses to poultry production. Due to the fact that both salmonellas have similar antigenic composition, their differentiation has been based in biochemical tests. However, this fact that this kind of procedure is very troublesome and the occurence of strains showing atypical behavior have stimulated the search for others diagnostic methods, such as molecular tests. In the present study, a method described in the literature using gene rfbS was analyzed together with tests developed based on genes speC and speF. Gene rfbS encodes an enzyme that acts on the cell wall of bacteria and has been used in the differentiation between SP and SG. In order to standardize the PCR procedure to be used in laboratory routine, two methods for DNA extraction were used, as well as different concentrations of the reagents. However, due to the difficulty in the standardization observed from the beginning of the study, a PCR procedure was developed for genes speC and speF. These genes are related to the production of the enzyme ornithine-descarboxilase, active in SP and inactive in SG. After the initial tests, PCR of gene speC was standardized, and later on it was coupled with the enzymatic treatment with restriction enzyme Eco RI. Results obtained for gene rfbS as well as for genes speC and speF enabled differentiation of 13 SP and 20 SG strains isolated in Brazil and two strains ATCC. So, the sanitary actions and the decisions in the livestock can to be conduced with safety and rapidity. / Doutor

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