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. 1990 Feb;69(2):184–189.

Immune responses in BALB/c mice following immunization with aromatic compound or purine-dependent Salmonella typhimurium strains.

D O'Callaghan 1, D Maskell 1, J Tite 1, G Dougan 1
PMCID: PMC1385587  PMID: 2106482

Abstract

Two near isogenic strains of Salmonella typhimurium HWSH, stably mutated in either the aroA gene affecting the biosynthesis of aromatic compounds, or the purA gene affecting the biosynthesis of purines, were administered intravenously as live attenuated vaccines to BALB/c mice. HWSH aroA-immunized mice were well protected against intravenous (i.v.) challenge with wild-type virulent HWSH for at least 10 weeks, whereas HWSH purA-immunized mice were unprotected. Furthermore, HWSH aroA-immunized mice could also control a heterologous challenge with virulent Listeria monocytogenes at 7 and 14 days post-immunization, whereas mice receiving a similar dose of HWSH purA could not. Increasing the i.v. dose of HWSH purA compared to HWSH aroA induced some resistance to L. monocytogenes. Induction of early anti-S. typhimurium resistance by HWSH aroA immunization appeared slightly later than the anti-L. monocytogenes resistance. Mice immunized with either vaccine were able to mount S. typhimurium-specific T-cell proliferative responses and produced anti-S. typhimurium humoral antibodies in their serum. The antibody titre was greater in those mice immunized with the aroA mutant.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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