Table 1 B. burgdorferi burdens in ticks obtained as larvae from captured mammals and allowed to molt
Mammal a | Number | Ticks examined | Nymphal infection prevalence | Mean spirochetes/infected tick (95% confidence interval) b | Mean spirochetes/ examined tick c |
|---|---|---|---|---|---|
Chipmunk | 1 | 60 | 0.23 | 2667 (1276–5572) | 622 |
Chipmunk | 2 | 14 | 0.36 | 15,922 (6637–38,194) | 5686 |
Chipmunk | 3 | 5 | 0.20 | 10,223 | 2047 |
Mouse | 1 | 7 | 1.0 | 4446 (2523–7834) | 4446 |
Mouse | 2 | 4 | 0.75 | 10,990 (7096–17,022) | 8243 |
Mouse | 3 | 7 | 1.0 | 4943 (2512–9727) | 4943 |
Mouse | 4 | 7 | 0.86 | 714 (239–2138) | 612 |
Mouse | 5 | 7 | 1.0 | 7568 (3350–17,100) | 7568 |
Mouse | 6 | 7 | 1.0 | 6166 (4385–8670) | 6166 |
Mouse | 7 | 7 | 1.0 | 19,588 (11,324–33,884) | 19,588 |
Mouse | 8 | 7 | 1.0 | 9616 (5408–17,100) | 9616 |
Mouse | 9 | 7 | 1.0 | 7816 (5188–11,776) | 7816 |
Mouse | 10 | 5 | 0.80 | 2148 (863–5346) | 1718 |
Mouse | 11 | 7 | 1.0 | 25,468 (6668–97,275) | 25,468 |
Mouse | 12 | 7 | 1.0 | 4989 (3206–7762) | 4989 |
Mouse | 13 | 7 | 1.0 | 11,995 (9057–15,885) | 11,995 |
Mouse | 14 | 7 | 1.0 | 2188 (649–7379) | 2188 |
Opossum | 1 | 50 | 0.14 | 1786 (748–4266) | 250 |
Opossum | 2 | 27 | 0.59 | 755 (380–1500) | 447 |
Opossum | 3 | 50 | 0.04 | 1380 (540–3532) | 55 |
Opossum | 4 | 44 | 0.05 | 7 (6–9) | 357 |
Raccoon | 1 | 51 | 0.20 | 1358 (418–4416) | 266 |
Raccoon | 2 | 50 | 0.46 | 590 (289–1205) | 271 |
Raccoon | 3 | 49 | 0.08 | 2904 (1279–6592) | 237 |
Skunk | 1 | 11 | 0.09 | 3221 | 293 |
Squirrel | 1 | 15 | 0.67 | 2301 (1042–5082) | 1534 |
Squirrel | 2 | 40 | 0.08 | 4753 (2661–8492) | 357 |
Squirrel | 3 | 4 | 0.50 | 2655 (625–11,272) | 1327 |
Squirrel | 4 | 8 | 0.75 | 946 (676–1324) | 710 |
Vole | 1 | 7 | 0.29 | 5970 (4721–7551) | 1706 |
Vole | 2 | 48 | 0.08 | 3750 (920–15,276) | 312 |
Vole | 3 | 15 | 1.0 | 15,346 (13,305–17,701) | 15,346 |