<prompt> The Duffy antigen is associated withPl. falciparumPl. ovalePl. vivaxPl. malariae  <response>: Duffy blood group antigen alleles Fya and Fyb is the receptor for the attachment of merozoites of Plasmodium vivax. Its absence confers protection against merozoite invasion.Ref: K.D Chatterjee 13th edition, p97-100 