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Control of natural resistance to Salmonella typhimurium and Leishmania donovani in mice by closely linked but distinct genetic loci

Nature volume 287, pages 440–442 (1980)Cite this article

Abstract

Inbred strains of mice vary in their sensitivity to infection with both Salmonella typhimurium1,2 and Leishmania donovani3. In both cases, this differential susceptibility is genetically controlled. Resistance to the intracellular parasite L. donovani is determined by a single locus on chromosome 1, designated Lsh (ref. 4). The primary regulator of resistance to S. typhimurium is a single, dominant autosomal gene, named Ity (for immunity to typhimurium)5, and it has also been recently mapped to chromosome 1 (ref. 6). In addition, two other genetic loci regulate resistance to S. typhimurium in mice. These genes, Lpsd and xid, are mutant alleles that render C3H/HeJ and CBA/N mice, respectively, salmonella susceptible7,8. Both Bradley and his colleagues3,4, and Plant and Glynn2,6, noted similar patterns of resistance or susceptibility of inbred strains of mice to L. donovani and S. typhimurium, and therefore suggested that Lsh and Ity might be the same gene. Mapping of both genes to the same region of chromosome 1 supported this hypothesis but no linkage studies have been used to test it. Since recombinant inbred (RI) mouse strains are, in effect, permanent segregant populations9, they are ideal for determining linkage between resistance genes to two different pathogens. Therefore, we determined the S. typhimurium susceptibility of five sets of RI mouse strains that had been previously typed for Lsh4 and conclude that Lsh and Ity are closely linked but distinct genetic loci.

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Authors and Affiliations

  1. Department of Microbiology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, 20014

    Alison D. O'Brien

  2. Department of Medicine and Microbiology, Albert Einstein College of Medicine, New York, New York, 10046

    David L. Rosenstreich

  3. Jackson Laboratory, Bar Harbor, Maine, 04609

    Benjamin A. Taylor

Authors
  1. Alison D. O'Brien
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  2. David L. Rosenstreich
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  3. Benjamin A. Taylor
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O'Brien, A., Rosenstreich, D. & Taylor, B. Control of natural resistance to Salmonella typhimurium and Leishmania donovani in mice by closely linked but distinct genetic loci. Nature 287, 440–442 (1980). https://doi.org/10.1038/287440a0

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