Discovery of the arthropod vector of disease.
D000818:Animals; D001179:Arthropod Vectors; D001404:Babesiosis / Q000266:history / Q000635:transmission; D002417:Cattle; D002418:Cattle Diseases / Q000266:history / Q000635:transmission; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D013987:Ticks; D014481:United States; D014730:Veterinary Medicine / Q000266:history*