Faculty Research 1980 - 1989


Host defenses in experimental scrub typhus: mapping the gene that controls natural resistance in mice.

Document Type


Publication Date



Chromosome-Mapping, Chromosomes-Human-4-5, Crosses-Genetic, Genes, Human, Immunity-Natural, Male, Mice, Mice-Inbred-C3H, Mice-Inbred-C57BL, Mice-Inbred-DBA, Polymorphism-(Genetics)

JAX Source

J-Immunol. 1980 Sep; 125(3):1395-9.


Natural resistance of mice to lethal ifections of Rickettsia tsutsugamushi, strain Gilliam, is controlled by a single, autosomal, dominant gene, which we have designated Ric, with r and s representing the resistant nd susceptible alleles, respectively. Using three sets of recombinant inbred mouse strains (BXD, BXH, and BXJ), the Ric locus was mapped to Chromosome 5 closely linked to the retinal degeneration (rd) locus. This linkage was confirmed by a backcross analysis. Based on the RI strains and the C57BL/6Ty-le congenic strain (the only proven Ric-rd cross-over), we estimate the recombination frequency between Ric and rd to be 0.015. Three presumptive Ric-rd recombinants detected among 93 backcross mice may represent caes of incomplete penetrance of the resistance allele rather than recombination. Analyis of th C57BL/6JTy-le congenic strain indicates that Ric is proximal to rd on Chromosome 5. If so, the correct gene order is Pgm-1-W-Ric-rd-Gus.