Abstract
Plasmodium falciparum parasites infecting Aotus trivirgatus erythrocytes were cultured in media (Harvard and TC199) augmented with human, foetal calf, or other sera. Conditions were established which supported growth of parasites and allowed cyclical multiplication when fresh erythrocytes (from Aotus or Homo) were added in sub-culture (mean multiplication rate: X3). Immunoglobulin G pools, prepared from plasma collected in endemic malarious areas in Africa and from unexposed Britons, were tested for effects on the in vitro growth (measured by incorporation of tritiated leucine) and multiplication of parasites. Whilst non-immune IgG was without effect, IgG from both East and West Africa inhibited the multiplication of East African (Uganda-Palo Alto strain) parasites.
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