Table 5.
Semisolid plating of replete larvae infected by immersion
| Isolatea | No. of CFU per larva (avg ± SD)b |
|---|---|
| WT 297 | 227.3 ± 94.4 |
| Bb508 | 0.1 ± 1.3 |
| Bb807 | 0.3 ± 0.5 |
| WT B31 | 1,226 ± 855 |
| Bb1197 | 9.0 ± 9.0 |
a
Strain used to immerse naïve larvae. Viability of spirochetes within immersion-fed larvae was assessed after ticks had fed to repletion on naïve mice.
b
The number of CFU is based on pools of 15 larvae per isolate. Values represent results from three serial dilutions (undiluted, 10−1, and 10−2), plated in triplicate, for each larval pool.