ALL meanings of rickettsial
rick·ett·si·a
R r - noun plural rickettsial any member of the genus Rickettsia, comprising rod-shaped to coccoid microorganisms that resemble bacteria but can be as small as a large virus and reproduce only inside a living cell, parasitic in fleas, ticks, lice, and mites and transmitted by bite to vertebrate hosts, including humans, causing such severe diseases as typhus and Rocky Mountain spotted fever. 1
- noun plural rickettsial any rickettsia or rickettsialike microorganism of the orders Rickettsiales and Chlamydiales. 1