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Previous issue date: 2008-11-19 / In Brazil it is believed that bovine tuberculosis is present in all states, as is in all continents. The official indices are 1.3% of the national herd infected, which represent a large number in the order of 2.5 million animals. Mycobacterium bovis stands out as zoonotic disease of major importance. Increasing are the economic losses, caused by tuberculosis in cattle, such as low productivity of the herd, condemnation of carcasses at slaughterhouses, reduction in the production of milk and meat, commitment marketing of animals and their products domestically and externally. It is estimated that about 5,0 % of human tuberculosis is caused by Mycobacterium bovis. The success of a program to control a disease is closely linked to various factors including the knowledge of the history of the causative agent and its spatial and temporal distribution. Molecular methods are used as auxiliary tools in combating the disease by providing information in order to achieve these goals. In the last decade, methods for molecular typing of M. tuberculosis were developed and implemented on a large scale. Although the genomes of the two parasites are very similar, the discriminatory power of the methods is smaller in Mycobacterium bovis. In this study were analyzed samples from cattle slaughtered in refrigerators under Federal Inspection in the state of Minas Gerais. A total of 215 cultures sent to the Laboratory of Applied Molecular biology to Micobacterioses, and only 159 confirmed a profile of Mycobacterium bovis through molecular techniques applied. The south and state has the highest prevalence of the disease in the samples studied. The method of Spoligotyping applied to the samples showed the presence of 32 different profiles, obtaining a HGDI of 0.86 and a departure from the MIRU-VNTR presented 40 different profiles with a HGDI of 0.87. In this study was to evaluate that when using these techniques together we get a greater discriminatory power between these strains. / No Brasil acredita-se que a tuberculose bovina est? presente em todos os Estados, assim como est? em todos os continentes. Os ?ndices oficiais est?o em 1,3% do rebanho nacional infectado, que representaria um n?mero elevado, na ordem de 2,5 milh?es de animais. Mycobacterium bovis destaca-se como zoonose de reconhecida import?ncia. Crescentes s?o as perdas econ?micas, causada pela tuberculose em bovinos, como a baixa na produtividade do rebanho, condena??o de carca?as em matadouros, redu??o na produ??o de leite e carne, comprometimento da comercializa??o de animais e seus produtos no mercado interno e externo. Estima-se que em torno de 5,0% da tuberculose humana ? causada por M. bovis. O sucesso de um programa de controle de uma doen?a est? estreitamente ligado a diferentes fatores entre os quais o conhecimento da hist?ria do agente etiol?gico e sua distribui??o espacial e temporal. Os m?todos moleculares s?o utilizados como ferramentas auxiliares no combate ? doen?a fornecendo informa??es com a finalidade de alcan?ar estes objetivos. Na ?ltima d?cada, m?todos para tipagem molecular de Mycobacterium tuberculosis foram desenvolvidos e aplicados em larga escala. Embora o genoma dos dois parasitos seja muito parecido, o poder discriminat?rio dos m?todos decresce para Mycobacterium bovis. Neste trabalho foram analisadas amostras de bovinos abatidos em Frigor?ficos sob Inspe??o Federal no estado de Minas Gerais. Um total de 215 culturas foram enviadas ao Laborat?rio de Biologia Molecular Aplicada ? Micobacterioses, e apenas 159 confirmaram um perfil de Mycobacterium bovis atrav?s das t?cnicas moleculares de Spoligotyping e 159 a t?cnica do MIRU-VNTR. A mesorregi?o Sul e Sudoeste mostraram a maior preval?ncia da doen?a nas amostras estudadas. O m?todo de Spoligotyping aplicados ?s amostras mostrou a presen?a de 32 perfis diferentes, obtendo um HGDI de 0,86 e em contra partida o MIRU-VNTR apresentou 40 perfis diferentes com um HGDI de 0,87. Neste estudo foi poss?vel avaliar que quando utilizamos estas t?cnicas em conjunto obtemos um maior poder discriminat?rio entre essas cepas.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:jspui/1461 |
| Date | 19 November 2008 |
| Creators | Nascimento, Telma de Figueir?do do |
| Contributors | Jesus, Vera L?cia Teixeira de, Suffys, Philip Noel, Lage, Andrey Pereira, Oliveira, Angela de |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Programa de P?s-Gradua??o em Microbiologia Veterin?ria, UFRRJ, Brasil, Instituto de Veterin?ria |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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