Abstract

The energy metabolism of Plasmodium berghei sporozoites was studied by using their motility as an indicator of energy production and consumption. Sporozoites suspended in medium without sugars or amino acids ceased to move. Motility was restored by the addition of any of several sugars or amino acids to the medium. Inhibition of sporozoite motility, under otherwise favorable conditions, was induced by fluoride, malonate, cyanide, amytal, rotenone, antimycin A, arsenate, 2,4-DNP, and diphenylamine. The results suggest that these sporozoites utilize glycolysis, the Krebs' cycle, and conventional electron transport through the cytochrome chain.

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