Summary statistics of entomologic risk for <i>Ixodes pacificus</i> infected with <i>Borrelia</i> spp. in recreational areas of the San Francisco Bay Area.

1Betsy Crowder Trail is comprised of coast live oak woodland. 2Anniversary Trail is comprised of coastal scrub and moderate grassland. 3Meadow Trail is comprised of coast live oak woodland and Douglas fir forest. Data are presented on density of nymphal (DON) I. pacificus (i.e., number of nymphs/100m2 (calculated by (number of ticks collected/meters covered by transects) x100); density of infected nymphs (DIN) for Borrelia spp. (calculated by Borrelia prevalence x DON); and for B. miyamotoi, B. burgdorferi ss, and for B. burgdorferi sl.