Oral immunization with polyvalent streptomycin-dependent Escherichia coli vaccine.

@article{Felsenfeld1972OralIW,
  title={Oral immunization with polyvalent streptomycin-dependent Escherichia coli vaccine.},
  author={Oscar Felsenfeld and Robert H. Wolf and William R. Greer and Richard B. Brannon},
  journal={Applied microbiology},
  year={1972},
  volume={23 3},
  pages={444-8}
}
Streptomycin-dependent Escherichia coli serotypes O 111, O 55 and O 26 were used to vaccinate young patas monkeys against these organisms by the oral route. Five administrations of 10(10) cells in 3-day intervals gave almost full protection to the animals against challenge with 9 to 11 minimal infective doses of homologous virulent organisms for at least 1… CONTINUE READING