Minimum infectious dose | PFUa | ID50a | FD50a | PFUb | Organisms | Â | |||||
---|---|---|---|---|---|---|---|---|---|---|---|
 | Chicken embryo cells | L cell | Chicken embryo | Mouse | Guinea pig | Guinea pig | Rat | Mouse BALB/c | Non-human primates | Humans | Reference |
R. typhi Wilmington | 3 | 15 | 325 | 2 | 5 | 11 | Â | Â | Â | Â | [30] |
R. prowazekii Cairo 3 | 5 | 3 | 20 | 15 | 9 | 9 | Â | Â | Â | Â | [30] |
R. prowazekii Brenl | 2 | 2 | 41 | 393 | 1 | 2 | Â | Â | Â | Â | [30] |
R. canadensis | 4 | 138 | 4 | 9.7 × 104 | 1.1 × 104 | 2.7 × 106 |  |  |  |  | [30] |
R. rickettsii Sheila Smith | 7 | 15 | 315 | \( \ge \)1.0 × 105 | 126 | 126 |  |  |  |  | [30] |
R. rickettsii R | 2 | 0.5 | 7 | 1.6 × 106 | 21 | 21 |  |  |  |  | [30] |
R. conorii Malish | 2 | 0.7 | 220 | 1,692 | 47 | 319 | Â | Â | Â | Â | [30] |
R. siberica 246 | 3 | 1 | 62 | 6,300 | 23 | 34 | Â | Â | Â | Â | [30] |
R. typhi Wilmington |  |  |  |  |  |  | 0.38–1.33 | 0.11–0.75 |  |  | [61] |
R. rickettsii | Â | Â | Â | Â | Â | Â | Â | Â | 1.5 | Â | [24] |
R. rickettsii Sheila Smith | Â | Â | Â | Â | Â | Â | Â | Â | 45 | Â | [23] |
R. rickettsii Sheila Smith | Â | Â | Â | Â | Â | Â | Â | Â | 450 | Â | [22] |
R. rickettsii Sheila Smith | Â | Â | Â | Â | Â | Â | Â | Â | Â | 13 | [25] |