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http://hdl.handle.net/1843/BUOS-8FDJRR| Type: | Tese de Doutorado |
| Title: | Mionecroses: estudos epidemiológicos e moleculares |
| Authors: | Ronnie Antunes de Assis |
| First Advisor: | Francisco Carlos Faria Lobato |
| First Co-advisor: | Francisco Alejandro Uzal |
| First Referee: | Vera Lucia Viegas de Abreu |
| Second Referee: | Romulo Cerqueira Leite |
| Third Referee: | Maurilio Andrade Rocha |
| metadata.dc.contributor.referee4: | Luiz Guilherme Dias Heneine |
| Abstract: | Realizaram-se estudos de casos de mionecroses causados por Clostridium chauvoei, Clostridium septicum e Clostridium sordelli, utilizando diferentes métodos laboratoriais. Fez-se estudo retrospectivo, empregando o complexo imunoenzimático estreptavidina-biotina peroxidase, em amostras clínicas parafinizadas de 33 casos de bovinos e suinos com suspeita clínica de mionecroses. padronizou-se uma técnica de PCR multiplex para detecção de C. chauvoei e C.septicum e, realizaram-se sequenciamento e análise filogenética de cinco isolados de campo e quatro sementes vacinais de C. septicum. No estudo retrospectivo, detectaram-se: C. Chauvoei, C. septicum, C.chauvoei mais Clostridium novyi tipo A e C. chauvoei mais C. sordellii em 21. oito, doi, um e um casos, respectivamente. A técnica de PCR multiplex amplificou eficientemente sequencias gênicas de C. chauvoei e C. septicum, apresentando sensibilidade de 45pg/uL e 30pg/uL, respectivamente. Não foram observadas reações cruzadas com outras espécies de clostridios, outras espécies bacterianas e, entre ambos os agentes. Pelo sequenciamento e análise filogenética, observou-se a existência de dois diferentes grupos de C. septicum. |
| Abstract: | A study of natural cases of myonecroses by Clostridium chauvoei, Clostridium septicum and Clostridium sordellii was performed. In addition, a retrospective study employing the streptavidin-biotin peroxidase technique was made on formalin-fixed, paraffin-embedded tissues of 33 field cases from cattle and swine suspected of myonecrosis. A multiplex PCR tecnique for detection of C. chauvoei and C. septicum was standardized, and sequencing and phylogenetic analyses of five isolates and four vaccine strains of C. septicum was made. The results of the retrospective study revealed the presence of C. chauvoei, C. septicum, C. chauvoei plus C. septicum, C. chauvoei plus Clostridium novyi type A and C. chauvoei plus C. sordelli in 21, eight, two one and one cases, respectively. The multiplex PCR technique showed to be efficient for amplifyng genomic sequences of C. chauvoei and C. septicum isolates presenting a sensitivity of 45pg/uL, respectively. No cross reactions were observed toi other Clostridia, other bacterial species or between both agents. By the sequencing and phylogenetic analyses, the existence of two different genotypic groups of C. septicum was determined. |
| Subject: | Clostridium Epidemiologia Reação em cadeia de polimerase |
| language: | Português |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| Rights: | Acesso Aberto |
| URI: | http://hdl.handle.net/1843/BUOS-8FDJRR |
| Issue Date: | 30-Mar-2005 |
| Appears in Collections: | Teses de Doutorado |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| tese_de_doutorado_de_ronnie_antunes_de_assis.pdf | 14.39 MB | Adobe PDF | View/Open |
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