Made available in DSpace on 2014-06-11T19:32:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-16Bitstream added on 2014-06-13T20:44:07Z : No. of bitstreams: 1 alexandrino_b_dr_jabo.pdf: 403623 bytes, checksum: a596d9d91434dd37dd44458b1b70eb74 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / A presente pesquisa teve como objetivo avaliar a utilização de cobaias e caprinos para teste de vacinas contra o herpesvírus bovino tipo 1 (BoHV-1) e os vírus da diarreia viral bovina tipos 1 (BVDV-1) e 2 (BVDV-2). Inicialmente foi realizada a infecção experimental em cobaias e bovinos, com esses três vírus, para verificar a máxima resposta imunogênica em ambas as espécies. As médias geométricas dos títulos de anticorpos (GMT) dos bovinos foram altas para todos os agentes virais; em cobaias foi possível observar que o BoHV-1 induziu elevadas GMT, para o BVDV-1 a indução foi moderada, enquanto para o BVDV-2 foi baixa, podendo comprometer a viabilidade dos testes antigênicos. Após essa etapa, foram vacinados bovinos, cobaias e caprinos, com seis vacinas comerciais de antígenos inativados, para verificar a indução de anticorpos por estímulo vacinal. Nos bovinos, as GMT obtidas para o BoHV-1 mostraram que as vacinas utilizadas promoveram a indução moderada na resposta imunológica, e apenas três delas foram consideradas satisfatórias. Para o BVDV-1, apenas uma vacina pode ser considerada eficiente, e em relação ao BVDV-2 nenhuma delas poderia ser assim classificada. Os resultados da vacinação com os caprinos mostraram que, apesar de os animais serem reagentes ao BoHV-1 no início do experimento, as formulações foram capazes de induzir a produção de anticorpos com títulos elevados contra os três vírus estudados. As cobaias, por sua vez, receberam doses fracionadas de uma vacina comercial nacional e, das frações testadas, 3,2mL foi a que apresentou melhores resultados, sendo esta estabelecida para testar as demais vacinas nesta espécie. Depois da imunização, os resultados mostram que para o BoHV-1 as GMT foram altas; em relação ao BVDV-1, apenas duas vacinas foram capazes de induzir... / The present research had as objective to evaluate the use of guinea pigs and goats in test of vaccines against the bovine herpesvirus type 1 (BoHV-1) and the bovine viral diarrhea viruses types 1 (BVDV-1) and 2 (BVDV-2). First, an experimental infection was realized in guinea pigs and bovines, using these three viruses, to verify the maximum immune response in both species. The geometric means of antibodies titres (GMT) for bovines were high for the viral agents; in guinea pigs was possible to observe that the GMT induced by BoHV-1 was high, by BVDV-1 was moderate and by BVDV-2 was weak and could compromise the viability of antigenic tests. After this stage, the bovines, guinea pigs and goats were vaccinated using six commercial vaccines with inactivated antigens to verify the induction of antibodies production by vaccinal stimulus. In bovines, the GMT obtained for BoHV-1 showed the vaccines induced a moderate immune response, being only three of them considered satisfactory. For BVDV-1 only one and for BVDV-2 none of them can have the same classification. The results obtained with the goats, despite they were positive to BoHV-1 in the sorting, showed the formulations were able to induce high antibody production against the three virus studied. The guinea pigs, on the other hand, received fractional doses of a commercial vaccine well-established in the domestic trade and, from the fractions tested, 3.2 mL showed the best results, being established to test the other vaccines. After immunization, the results of GMT for BoHV-1 was high; relating to BVDV-1, only two vaccines were capable to induce antibodies production, but their GMT were weak; and there was no immune response against BVDV-2. Thus, goats can be ... (Complete abstract click electronic access below)

Orientador: Samir Issa Samara / Banca: Moacir Marchiori Filho / Banca: Fabio Carvalho Dias / Banca: Adolorata Aparecida Bianco Carvalho / Banca: Luís Antonio Mathias / Resumo: A presente pesquisa teve como objetivo avaliar a utilização de cobaias e caprinos para teste de vacinas contra o herpesvírus bovino tipo 1 (BoHV-1) e os vírus da diarreia viral bovina tipos 1 (BVDV-1) e 2 (BVDV-2). Inicialmente foi realizada a infecção experimental em cobaias e bovinos, com esses três vírus, para verificar a máxima resposta imunogênica em ambas as espécies. As médias geométricas dos títulos de anticorpos (GMT) dos bovinos foram altas para todos os agentes virais; em cobaias foi possível observar que o BoHV-1 induziu elevadas GMT, para o BVDV-1 a indução foi moderada, enquanto para o BVDV-2 foi baixa, podendo comprometer a viabilidade dos testes antigênicos. Após essa etapa, foram vacinados bovinos, cobaias e caprinos, com seis vacinas comerciais de antígenos inativados, para verificar a indução de anticorpos por estímulo vacinal. Nos bovinos, as GMT obtidas para o BoHV-1 mostraram que as vacinas utilizadas promoveram a indução moderada na resposta imunológica, e apenas três delas foram consideradas satisfatórias. Para o BVDV-1, apenas uma vacina pode ser considerada eficiente, e em relação ao BVDV-2 nenhuma delas poderia ser assim classificada. Os resultados da vacinação com os caprinos mostraram que, apesar de os animais serem reagentes ao BoHV-1 no início do experimento, as formulações foram capazes de induzir a produção de anticorpos com títulos elevados contra os três vírus estudados. As cobaias, por sua vez, receberam doses fracionadas de uma vacina comercial nacional e, das frações testadas, 3,2mL foi a que apresentou melhores resultados, sendo esta estabelecida para testar as demais vacinas nesta espécie. Depois da imunização, os resultados mostram que para o BoHV-1 as GMT foram altas; em relação ao BVDV-1, apenas duas vacinas foram capazes de induzir... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The present research had as objective to evaluate the use of guinea pigs and goats in test of vaccines against the bovine herpesvirus type 1 (BoHV-1) and the bovine viral diarrhea viruses types 1 (BVDV-1) and 2 (BVDV-2). First, an experimental infection was realized in guinea pigs and bovines, using these three viruses, to verify the maximum immune response in both species. The geometric means of antibodies titres (GMT) for bovines were high for the viral agents; in guinea pigs was possible to observe that the GMT induced by BoHV-1 was high, by BVDV-1 was moderate and by BVDV-2 was weak and could compromise the viability of antigenic tests. After this stage, the bovines, guinea pigs and goats were vaccinated using six commercial vaccines with inactivated antigens to verify the induction of antibodies production by vaccinal stimulus. In bovines, the GMT obtained for BoHV-1 showed the vaccines induced a moderate immune response, being only three of them considered satisfactory. For BVDV-1 only one and for BVDV-2 none of them can have the same classification. The results obtained with the goats, despite they were positive to BoHV-1 in the sorting, showed the formulations were able to induce high antibody production against the three virus studied. The guinea pigs, on the other hand, received fractional doses of a commercial vaccine well-established in the domestic trade and, from the fractions tested, 3.2 mL showed the best results, being established to test the other vaccines. After immunization, the results of GMT for BoHV-1 was high; relating to BVDV-1, only two vaccines were capable to induce antibodies production, but their GMT were weak; and there was no immune response against BVDV-2. Thus, goats can be ... (Complete abstract click electronic access below) / Doutor

Herpes simplex virus is man's oldest viral enemy. Infections result in symptoms ranging from mild skin lesions to deadly herpes simplex encephalitis, making HSV one of the most costly of viral diseases to treat. Thus the development of a vaccine is imperative. To this end, several vaccine strategies have been utilized to generate immunity to HSV in rodents. These include the use of recombinant DNA, recombinant adenoviruses, and dendritic cells transduced with either of the former and re-introduced to the host to induce immunity. In this study, different aspects of these vaccine types were examined. Antibody and cytotoxic T-cell (CTL) responses to a DNA vaccine encoding gB of HSV-1 (gB-DNA) were evaluated. This resulted in variable long lived antibody responses to a wide range of dosages and CTL responses which followed dose-response relationships. An adenovirus expressing gB of HSV -1 (AdgB) which is able to generate IgA responses (Gallichan et al., 1993) was utilized to determine the best method of mucosal administration to optimize these responses. It was suggested in a previous report that nasal associated lymphoid tissue (NALT) was the desired target for inducing lgA responses (Heritage et al., 1997). Accordingly, the hypothesis was formulated that NALT can produce IgA responses similar to those produced from a combination of inductive sites. To test this hypothesis, mice were immunized either awake or asleep with AdgB assuming that awake delivery restricts induction to the NALT, whereas asleep administration disseminates AdgB throughout the respiratory system. The results demonstrate participation of lower airways in the induction of immunity is desirable for generating IgA responses. Lastly, dendritic cells transduced with AdgB were assessed for their ability to generate systemic and mucosal antibody responses, resulting in the inability to generate IgA, but the ability to generate systemic antibody responses. / Thesis / Master of Science (MS)