Definitions for "Rickettsia"
Keywords:  pleomorphic, lice, ticks, fleas, mites
any of a group of parasitic bacteria that live in arthropods (as ticks and mites) and can cause disease if transmitted to human beings
a microbe that is somewhere between a bacteria and a virus
disease causing microorganisms, smaller than bacteria but larger than viruses. Usually transmitted to humans by the bites of fleas, lice and ticks.
A single-celled animal and human diseasecausing organism with a partial cell wall that has not been grown in culture.