When Did Ticks Start Carrying Diseases? A Timeline
Ticks have likely transmitted microbes among wildlife for millions of years, long before people could identify a tick-borne disease or connect an illness to a bite. For Lyme disease, doctors recognized unusual illness clusters in Lyme, Connecticut, around 1975. Scientists linked the illness to the spirochete later named Borrelia burgdorferi in 1981. Other tick-borne diseases…