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Genetic studies in human and murine giardiasis.
  1. I C Roberts-Thomson,
  2. G F Mitchell,
  3. R F Anders,
  4. B D Tait,
  5. P Kerlin,
  6. A Kerr-Grant,
  7. P Cavanagh


    Genetic markers were analysed in 48 adults who appeared to have a prolonged infection with Giardia lamblia. The frequency of ABO blood groups, Rhesus blood groups, and Gm phenotypes was similar to that in control subjects. However, there was a higher than expected frequency of HLA antigens A1 (observed 46 . 7%, expected 32%) and B12 (observed 47 . 8%, expected 25 . 8%) and a higher than expected frequency of the phenotypes A1/A2 and B12/B27. Genetic studies were also performed with inbred strains of mice showing relatively rapid (BALB/c) and defective (C3H/He) spontaneous elimination of Giardia muris. From analysis in backcross mice several genes appeared to influence susceptibility to prolonged infection with G. muris.

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