Fig. 1.

Varying rosetting of RF Borrelia: B.hp (B. hispanica CR1), B.co (B. coriaceae), B.d (B. duttonii 1120), B.h (B. hermsii HS1), B.r (B. recurrentis A11), B.c (B. crocidurae CR2A), and B.t (B. turicatae 071). Cells were harvested at comparable growth stages (late log). Percent rosetting was calculated as ratio of absorbance (405 nm) of released hemoglobin to spirochete number and normalized against the value for B. hispanica, defined as 100%. Samples were assayed in triplicate. Standard deviations are shown.