Fig. 4From: Efficient infection of non-human primates with purified, cryopreserved Plasmodium knowlesi sporozoites Development of parasitaemia in pig-tailed macaques. A, B Pre-patent periods by animal and group as defined by first appearance of detectable parasites in thin blood smear preparations C Change in Plasmodium 18 S rRNA copies in blood post-infection by 18 S rRNA qRT–PCR performed at the University of WashingtonBack to article page