The Duffy antigen is associated with: (A) Pl. falciparum, (B) Pl. ovale, (C) Pl. vivax, (D) Pl. malariae
Answer is C. 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