▁ μ m ▁wide . ▁ ▁S pi ro ch etes ▁move ▁using ▁ax ial ▁fil aments ▁called ▁end of lag ella ▁in ▁their ▁peri pl asm ic ▁space . ▁The ▁fil aments ▁rotate ▁in ▁this ▁space , ▁between ▁the ▁outer ▁memb rane ▁and ▁the ▁pe pt id og ly can ▁layer , ▁prop elling ▁the ▁b acter ium ▁forward ▁in ▁a ▁c ork s cre w - like ▁motion . ▁The ▁outer ▁memb rane ▁of ▁Bor rel ia ▁species ▁contains ▁outer ▁surface ▁prote ins ▁( O sp ) ▁that ▁play ▁a ▁role ▁in ▁their ▁vir ul ence . ▁ ▁Ph y log eny ▁The ▁currently ▁accepted ▁tax onomy ▁is ▁based ▁on ▁the ▁List ▁of ▁Pro k ary otic ▁names ▁with ▁Stand ing ▁in ▁N omen cl ature ▁( L PS N ) ▁and ▁National ▁Center ▁for ▁Bi ote chn ology ▁Information ▁( NC BI ) ▁and ▁the ▁ph y log eny ▁is ▁based ▁on ▁ 1 6 S ▁r R NA - based ▁L TP ▁release ▁ 1 1 1 ▁by ▁the ▁All - Spe cies ▁Living ▁Tree ▁Project . ▁ ▁Notes : ▁ ♦ ▁Type ▁stra in ▁lost ▁or ▁not ▁available ▁ ♠ ▁Stra ins ▁found ▁at ▁the ▁NC BI , ▁ ▁but ▁not ▁listed ▁in ▁the ▁L SP N ▁ ♥ ▁Stra ins ▁neither ▁lod ged ▁at ▁NC BI ▁nor ▁listed ▁in ▁the ▁L PS N ▁▁ ▁V ectors ▁▁ ▁T icks ▁▁ ▁Hard ▁t icks ▁of ▁the ▁family ▁I x od idae ▁are ▁common ▁vectors ▁of ▁Bor ell ia