The frequency of salmonellae in wild ducks.
D000818:Animals; D001434:Bacteriophage Typing; D004372:Ducks; D005243:Feces / Q000382:microbiology; D008131:London; D012481:Salmonella Infections, Animal / Q000453:epidemiology*; D012486:Salmonella typhimurium / Q000302:isolation & purification; D012703:Serotyping