Genetic characteristics of the Salmonella typhi strain Ty21a vaccine.

@article{Silva1987GeneticCO,
  title={Genetic characteristics of the Salmonella typhi strain Ty21a vaccine.},
  author={Bagn{\'o}lia Ara{\'u}jo da Silva and Charles Gonzalez and Guido C. Mora and Felipe Cabello},
  journal={The Journal of infectious diseases},
  year={1987},
  volume={155 5},
  pages={1077-8}
}