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Incidence of plague in mice infected with the wild-type Y. pestis 195/P strain after flea bite challenge
| Mouse no. | No. of challenges (median, 3) | Total no. of flea bites (cumulative) (median, 57.5) | No. of blocked flea bites (cumulative) (median, 6) | Time to onset of disease (days) (median, 3) | Outcomea |
|---|---|---|---|---|---|
| 1 | 1 | 4 | 1 | 2 | B |
| 2 | 1 | 13 | 2 | 3 | B |
| 3 | 1 | 20 | 2 | 3 | B |
| 4 | 3 | 87 | 10 | 3 | B |
| 5 | 3 | 70 | 6 | 4 | B |
| 6 | 4 | 68 | 9 | 4 | B |
| 7 | 1 | 17 | 3 | 3 | S |
| 8 | 3 | 51 | 10 | 3 | S |
| 9 | 3 | 64 | 6 | − | |
| 10 | 4 | 69 | 7 | − |
B, bubonic plague; S, septicemic plague; −, no disease.
