Ancient human sialic acid variant restricts an emerging zoonotic malaria parasite

Abstract

Plasmodium knowlesi infects macaques and can cause malaria in humans. Here, Dankwa et al. show that the absence of a sialic-acid component on the surface of macaque red blood cells (RBCs) limits infection of human RBCs with P. knowlesi, but the parasite can adapt to invade human RBCs by using alternative pathways.