title: Natural occurrence and experimental study of pox and Haemoproteus infections in a mute swan (Cygnus olor).
mesh_terms: D000818:Animals; D016782:Apicomplexa; D001715:Bird Diseases / Q000453:epidemiology*; D009518:New York; D011213:Poxviridae Infections / Q000662:veterinary*; D011529:Protozoan Infections, Animal