The extracellular survival and development in vitro of the erythrocytic stages of Plasmodium lophurae were favored by the addition to the culture medium of l-malic acid and concentrates rich in coenzyme A. In a concentrated extract of duck erythrocytes supplemented with these two substances in addition to adenosinetriphosphate, sodium pyruvate, and certain other materials of like nature, only 5 to 10 per cent of the extracellular parasites had become abnormal after 3 days of cultivation.
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Copyright, 1952, by The Rockefeller Institute for Medical Research New York
1952
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