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| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [B] Rickettsia conorii | RICCN156 |  LEP_RICCN | 5123 | (29) |
| [B] Rickettsia akari (strain Hartford) | RICAH166 | LEP_RICAH | 5136 | (22) |
| [B] Rickettsia canadensis (strain McKiel) | RICCK112 | LEP_RICCK | 5127 | (26) |
| [B] Rickettsia massiliae (strain Mtu5) | RICM5108 | LEP_RICM5 | 5123 | (29) |
| [B] Rickettsia felis | RICFE1138 | LEP_RICFE | 5136 | (22) |
| [B] Rickettsia prowazekii | RICPR112 | LEP_RICPR | 5123 | (29) |
| [B] Rickettsia typhi | RICTY18 | LEP_RICTY | 5127 | (26) |