Revista Cubana de Medicina Tropical
On-line version ISSN 1561-3054
GARCIA, Hilda María et al. Selection of attenuated Vibrio cholerae strains to obtain oral attenuated candidate vaccines against cholera. Rev Cubana Med Trop [online]. 2005, vol.57, n.2, pp. 1-1. ISSN 1561-3054.
A methodology was developed for the selection of genetically modified strains of Vibrio cholerae 01 and 0139 aimed at obtaining oral attenuated candidate vaccines against cholera. The modified strains underwent microbiological characterization, bacterial susceptibility and different biological tests (mean lethal dose, colonizing capacity, adherence in mice, ligated intestine and intraduodenal inoculation in rabbits as virulence and potency tests. The strains 81, 638, 638T and 1333 were evaluated in clinical trials to determine their reactogenicity and immunogenicity. All the strains were sensitive to tetracycline and doxoclycine. They showed their attenuation and immunogenicity in animal models. The strains 638 and 1333 proved to be immunogenic and non reactogenic in volunteers.
Keywords : Attenuated strains of Vibrio cholerae; candidate vaccines; animal models and clinical trials.