| BiologicalAgents that are rickettsial organisms, i.e. gram-negative bacteria that infect mammals and arthropods. |
| •owl:Thing |
| •SpatioTemporalThing |
| •Endurant |
| •PhysicalEndurant |
| •PhysicalObject |
| •AgentivePhysicalObject |
| •BiologicalAgent |
| •Bacterium |
| •RickettsialAgentBacterium |