Count | |
| 2 | |
| 4 | |
| 1 | |
| 2 | |
| 1 | |
| 2 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 2 | |
| 1 | |
| 1 | |
| 1 | |
| 3 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
Rickettsia/*classification/*genetics/isolation & purification | 1 |
| 1 | |
| 2 | |
| 1 | |
Rickettsia conorii/*classification/genetics/growth & development | 1 |
Rickettsia Infections/diagnosis/*epidemiology/etiology/therapy | 1 |
| 1 | |
| 1 | |
| 1 | |
| 7 | |
| 5 | |
| 39 | |
| 20 | |
| 2 | |
| 1 | |
| 27 | |
| 6 | |
| 76 | |
| 1 | |
| 497 | |
| 8 | |
| 106 | |
| 46 | |
| 33 | |
| 2 | |
| 56 | |
| 2 | |
| 7 | |
| 1 | |
| 17 | |
| 2 | |
| 1 | |
| 2 | |
| 2 | |
| 59 | |
| 2 | |
| 4 | |
| 1 | |
| 3 | |
| 1 | |
| 1 | |
| 9 | |
| 1 | |
| 15 | |
| 9 | |
| 20 | |
| 1 | |
| 4 | |
| 1 | |
| 1 | |
| 199 | |
| 2 | |
| 11 | |
| 2 | |
| 1 | |
| 2 | |
| 3 | |
| 1 | |
| 1 | |
| 28 | |
| 1 | |
| 128 | |
| 1 | |
| 9 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 3 | |
| 19 | |
| 3 | |
| 1 | |