▁ ♦ ▁( B rum pt ▁ 1 9 2 1 ) ▁Br um pt ▁ 1 9 2 2 B or rel ia ▁vin cent ii ▁ ♥ ▁ ▁" B or rel ia ▁y ang tz ensis " ▁Marg os ▁et ▁al . ▁ 2 0 1 5 ▁}} B or rel ia ▁is ▁a ▁genus ▁of ▁b acter ia ▁of ▁the ▁sp iro ch ete ▁ph yl um . ▁It ▁causes ▁L yme ▁disease , ▁also ▁called ▁L yme ▁bor re li osis , ▁a ▁z oon otic , ▁vector - bor ne ▁disease ▁transm itted ▁primarily ▁by ▁t icks ▁and ▁by ▁l ice , ▁depending ▁on ▁the ▁species ▁of ▁b acter ia . ▁The ▁genus ▁is ▁named ▁after ▁ ▁French ▁bi ologist ▁Am éd ée ▁Bor rel ▁( 1 8 6 7 – 1 9 3 6 ), ▁who ▁first ▁documented ▁the ▁distinction ▁between ▁a ▁species ▁of ▁Bor rel ia , ▁B . ▁an ser ina , ▁and ▁the ▁other ▁known ▁type ▁of ▁sp iro ch ete ▁at ▁the ▁time , ▁Tre pon ema ▁p all id um . ▁This ▁b acter ium ▁must ▁be ▁viewed ▁using ▁dark - field ▁micro sc opy , ▁which ▁make ▁the ▁cells ▁appear ▁white ▁against ▁a ▁dark ▁background . ▁Bor rel ia ▁species ▁are ▁grown ▁in ▁ ▁Bar bour - Sto en ner - K elly ▁medium . ▁Of ▁ 5 2 ▁known ▁species ▁of ▁Bor rel ia , ▁ 2 1 ▁are ▁members ▁of ▁the ▁L yme ▁disease ▁group , ▁ 2