MHC haplotype influences primary Giardia muris infections in H-2 congenic strains of mice.

The course of primary Giarda muris infections was studied in H-2 congenic strains of mice on the BALB and C57BL/10 (B10) genetic backgrounds. Infection was curtailed more rapidly in B10 strains, compared with BALB strains, and unaffected by H-2 haplotype. On the other hand the duration of infection in BALB strains did vary with H-2 haplotype with BALB/B(H-2b) mice taking significantly longer to clear infection than BALB/c(H-2d) and BALB/K(H-2k) mice. These experiments demonstrate that both MHC and non-MHC genes influence the outcome of primary G.muris infections.