A single gene determines rapid expulsion of Trichinella spiralis in mice.
In rats and some inbred mouse strains, one immune response, rapid expulsion, confers up to 95% protection against a challenge infection with Trichinella spiralis. Strain analysis in mice has shown that only three inbred strains, all originating from Swiss-line mice at the National Institutes of Health, Bethesda, Md., express rapid expulsion. Crosses between responder strain mice (NFR/N) and nonresponders (C3H/HeJ or B10 X BR) have indicated that rapid expulsion is dominant and autosomal (Bell et al., Exp. Parasitol. 53:301-314, 1982). In this study a segregation analysis of rapid expulsion in the F2 and backcross conformed to the Mendelian ratios expected of a single gene. This gene was not linked to the major histocompatibility complex (MHC) (chromosome 17) or the gene for albinism (c/c locus on chromosome 7). This locus has not previously been identified as conferring resistance to any infectious agent, and we have therefore designated the gene Ihe-1 (intestinal helminth expulsion 1).
D000818:Animals; D003433:Crosses, Genetic; D005802:Genes, MHC Class II; D007113:Immunity, Innate; D051379:Mice; D008815:Mice, Inbred Strains; D013045:Species Specificity; D014234:Trichinella / Q000472:pathogenicity*; D014235:Trichinellosis / Q000276:immunology*