Characterization and protective properties of attenuated mutants of Salmonella choleraesuis.

Abstract excerpt

We have constructed crp::Tn10 and cya::Tn10 Salmonella choleraesuis mutants and their fusaric acid-resistant derivatives with deletions (delta) of the Tn10 and adjacent DNA sequences and found them to be avirulent and able to induce protection against a wild-type challenge in 8-week-old BALB/c mice. Mice survived infection with the crp and cya mutants at doses of more than 7 x 10(3) times the oral (p.o.) 50%...

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