title: Egg production by Trichobilharzia ocellata (Trematoda: Schistosomatidae) after initial and challenge infection in ducks.
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000469:parasitology*; D004372:Ducks; D005243:Feces / Q000469:parasitology; D010270:Parasite Egg Count; D014200:Trematoda / Q000502:physiology*; D014201:Trematode Infections / Q000469:parasitology / Q000662:veterinary*