Although PERSON@1 realized in NUMBER@1 that MISC@1 disease was a tick-borne disease , the cause of the disease remained a mystery until NUMBER@2 , when B. burgdorferi was identified by PERSON@2 .

Although PERSON@1 realized in NUMBER@1 that MISC@1 disease was a tick-borne disease , the cause of the disease remained a mystery until NUMBER@2 .
