FIG. 3.

B. burgdorferi burdens in C3H/HeJ mice infected by tick transmission. Spirochete burdens in bladder, heart, and joint samples of mice infected with either N40-75 or cN40 via tick transmission are shown. The relative spirochete burden is expressed as the number of copies of the B. burgdorferi flaB gene per murine actin gene. Each individual circle represents a mouse tissue sample. Horizontal bars indicate the median for each set of data. Results from one of three representative studies are shown.