Equine disease surveillance, January to March 2009.
D000818:Animals; D001424:Bacterial Infections / Q000175:diagnosis / Q000453:epidemiology / Q000662:veterinary*; D005260:Female; D014943:Global Health; D006734:Horse Diseases / Q000175:diagnosis* / Q000453:epidemiology*; D006736:Horses; D008297:Male; D018571:Sentinel Surveillance / Q000662:veterinary*; D014777:Virus Diseases / Q000175:diagnosis / Q000453:epidemiology / Q000662:veterinary*