Tags: Bacteria.
Rickettsia rickettsii (abbreviated as R. rickettsii) is a unicellular Gram-negative coccobacillus (plural coccobacilli) that is native to the New World. It belongs to the spotted fever group (SFG) of Rickettsia and is most commonly known as the causative agent of Rocky Mountain spotted fever (RMSF). By nature R. rickettsii is an obligate intracellular parasite that survive by an endosymbiotic relationship with other cells.R. rickettsii is a non-motile non-spore forming aerobic organism.
