We found 3 definitions of rickettsias from 2 different sources.
NounPlural: rickettsias |
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rickettsia - any of a group of very small rod-shaped bacteria that live in biting arthropods (as ticks and mites) and cause disease in vertebrate hosts; they cause typhus and other febrile diseases in human beings | ||
eubacteria, eubacterium, true bacteria a large group of bacteria having rigid cell walls; motile types have flagella | ||
family rickettsiaceae, rickettsiaceae microorganism resembling bacteria inhabiting arthropod tissues but capable of causing disease in vertebrates |