Strain | Ticks/mousea | Mouse infectivityb |
---|
Bb297 | 5 | 2/2 |
BbKH500 | 5 | 1/2 |
 | 10 | 4/6 |
- a Varying number of ticks infected with BbKH500 were allowed to feed to repletion on naïve mice.
- b Infection rates were assessed at three weeks post-infestation by culturing BbKH500 from ear-punch biopsies