@article{article, title = {{Evaluation of Two Salmonella typhimurium Hybrids as Challenge Organisms in a System for the Assay of Typhoid Vaccines}}, publisher = {{American Society for Microbiology}}, url = {{https://doi.org/10.1128/iai.38.1.201-205.1982 }}, year = {{1982}}, month = {{10}}, author = {{Johnson EM and Diena BB and Lior H and Ryan A and Krol P and Baron LS}}, doi = {{10.1128/iai.38.1.201-205.1982}}, volume = {{38}}, journal = {{Infection and Immunity}}, issue = {{1}}, pages = {{201-205}}, note = {{Accessed on 2026/10/16}}}