Full text
| |
| Author(s): |
Tatiana Rodrigues Fraga
Total Authors: 1
|
| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Ciências Biomédicas (ICB/SDI) |
| Defense date: | 2009-03-10 |
| Examining board members: |
Elizabeth Angelica Leme Martins;
Patricia Antonia Estima Abreu de Aniz;
Luis Carlos de Souza Ferreira
|
| Advisor: | Elizabeth Angelica Leme Martins |
| Abstract | |
Preventive measures as vaccines are the best strategies to combat leptospirosis. Seven potential vaccine candidates from L. iInterrogans serovar Copenhageni were studied: LipL32, LipL23 and LipL22 (lipoproteins), SphH e Sph4 (hemolysins), AnkB (ankyrin domain) and OmpA76 (OmpA domain). The genes were amplified, cloned and the proteins expressed in E. Coli e Salmonella enteric for challenge assays. In the first assay, hamsters were immunized with the recombinant salmonella to express OmpA76 in vivo, and challenged with serovar Pomona. The survival was 30% of the recombinant salmonella group, 100% of the commercial vaccine and 10% of the control groups. In the second assay, hamsters were immunized with a pool of the purified proteins and challenged with serovar Copenhageni. The survival was 30% of the group pool of proteins, 90% of the commercial vaccine, 100% of the bacterin and 0% of the PBS group. LipL32, OmpA76, LipL23 and LipL22 reacted with hamsters infected sera. Leptospiral extracts were recognized by specific sera against LipL32, OmpA76 and LipL23. (AU) | |