title: Point of view: from Machiavelli to Mad Cow Disease: 20th century ecological changes and the inevitable role of medicine in disease prevention.
mesh_terms: D000818:Animals; D002417:Cattle; D004196:Disease Outbreaks / Q000266:history; D004199:Disease Vectors; D004351:Drug Resistance; D017753:Ecosystem; D016643:Encephalopathy, Bovine Spongiform / Q000453:epidemiology / Q000266:history / Q000635:transmission; D005536:Foot-and-Mouth Disease / Q000453:epidemiology / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011634:Public Health / Q000266:history*; D015047:Zoonoses / Q000266:history* / Q000635:transmission