B. burgdorferi presence correlates with lymphadenopathy in mice infected with host-adapted spirochetes.

*Cultures on lymph nodes assessed at 1 and 2 weeks. “+” indicates 4/4 positive and “–” indicates 0/4 negative culture result for B. burgdorferi (Bb).†Mean number of total cells (×106) of live cells from C57BL/6 mice (n = 4) counted via a hemocytometer using trypan blue exclusion. Numbers in bold indicate peak of lymph node cellularity.