title: Surveillance systems reported in CDI, 2011.
mesh_terms: D000818:Animals; D001315:Australia / Q000453:epidemiology; D002645:Chickens; D003140:Communicable Disease Control / Q000379:methods*; D003141:Communicable Diseases / Q000453:epidemiology*; D018563:Disease Notification; D006801:Humans; D017589:Immunization Programs / Q000379:methods; D011159:Population Surveillance / Q000379:methods*