Rhesus monkeys protected against Plasmodium knowlesi malaria produce antibodies against a 65,000-Mr P. knowlesi glycoprotein at the surface of infected erythrocytes

Plasmodium knowlesi, Macaca mulatta immunized by repeated infections, protection correlated with antibodies against 65,000-Mr P. knowlesi glycoprotein in membranes of infected erythrocytes, this correlation does not apply to monkeys protected against P. knowlesi malaria by vaccination