Journal article

Semi-quantitative measurement of Plasmodium falciparum antigen PfHRP2 in blood and plasma

V Desakorn, K Silamut, B Angus, D Sahassananda, K Chotivanich, P Suntharasamai, J Simpson, NJ White

Transactions of the Royal Society of Tropical Medicine and Hygiene | OXFORD UNIV PRESS | Published : 1997

Abstract

Plasmodium falciparum histidine rich protein 2 (PfHRP2) antigen was measured semi-quantitatively in whole blood, plasma, and supernatants and red blood cells of cultures in vitro using the dipstick ParaSight-F test and also by a quantitative antigen-capture enzyme-linked immunosorbent assay (ELISA). In vitro, PfHRP2 was secreted mainly during the second half of the asexual cycle with a marked rise during schizont development and rupture. The total PfHRP2 secreted before schizogony corresponded to approximately 4% of that contained in the red blood cells. In samples from 55 patients with acute falciparum malaria, the level of detection by ELISA corresponded to parasitaemias of 100/microL for ..

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