This family consists of several ookinete surface protein (Pvs28)from several species of Plasmodium. Pvs25 and Pvs28 areexpressed on the surface of ookinetes. These proteins arepotential candidates for vaccine and induce antibodies thatblock the infectivity of Plasmodium vivax in immunised animals[1]. Plasmodium ookinete surface protein Pvs28 Plasmod_Pvs28