title: Resistance of ducks to a Plasmodium sp. induced by a filterable agent.
mesh_terms: D000740:Anemia / Q000382:microbiology*; D000818:Animals; D004372:Ducks; D004906:Erythrocyte Count; D008288:Malaria / Q000097:blood*; D010587:Phagocytosis; D010961:Plasmodium / Q000032:analysis / Q000276:immunology*; D014777:Virus Diseases; D014780:Viruses / Q000302:isolation & purification