Abstract
A series ofH-2 and non-H-2 congenic resistant (CR) strains on a C57BL/10Sn background were infected with 107 amastigotes ofLeishmania donovani. Non-H-2 congenic strains B10.LP-H-3 b and B10.CE(30NX) and (B10.LP-H-3 b × B10)F1 hybrids showed a very rapid decrease in liver-parasite burdens beyond day 21. Parasite counts for these strains at day 35 were significantly lower than for all other strains tested. The rapid decrease in parasite numbers, massive lymphocellular infiltration into the liver and strong delayed hypersensitivity reactions to parasite antigens in strains congenic for a portion of chromosome 2 indicated that acquired immunity toL. donovani was controlled by a dominant gene at or near theIr-2 locus. In addition, B10.129(10M) mice, which differ from C57BL/10Sn at theH-11 locus, showed highly significant increases in parasite numbers at day 35. Other observations supporting the absence of acquired immunity in B10.129(10M) included negative delayed hypersensitivity tests to parasite antigens and the absence of lymphocellular infiltrate into the liver. Although the differences were not as pronounced,H-2 CR strains withH-2 b,H-2 a, andH-2 k haplotypes also showed significantly greater decreases in parasite numbers by day 35 as compared to otherH-2 CR strains.
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DeTolla, L.J., Semprevivo, L.H., Palczuk, N.C. et al. Genetic control of acquired resistance to visceral Leishmaniasis in mice. Immunogenetics 10, 353–361 (1980). https://doi.org/10.1007/BF01561585
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DOI: https://doi.org/10.1007/BF01561585