malaria, DNA, Protozoan - isolation & purification, Protozoan - blood, Disease Susceptibility - veterinary, Plasmodium - immunology, Avian - parasitology, Parasitemia - veterinary, Plasmodium - genetics, Erythrocytes - parasitology, Plasmodium - classification, Ducks - parasitology, Plasmodium - pathogenicity, Avian - immunology, Canaries - parasitology