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Rickettsias

Rickettsia
Rickettsia rickettsii.jpg
Rickettsia rickettsii (red dots) in the cell of a deer tick
Scientific classification
Domain: Bacteria
Phylum: Proteobacteria
Class: Alphaproteobacteria
Subclass: Rickettsidae
Order: Rickettsiales
Family: Rickettsiaceae
Genus: Rickettsia
da Rocha-Lima, 1916
Species

Rickettsea aeschlimannii
Rickettsiae africae
Rickettsea akari
Rickettsia asiatica
Rickettsia australis
Rickettsia canadensis
Rickettsia conorii
Rickettsia cooleyi
Rickettsia felis
Rickettsia heilongjiangensis
Rickettsia helvetica
Rickettsia honei
Rickettsia hulinii
Rickettsia japonica
Rickettsia massiliae
Rickettsia monacensis
Rickettsia montanensis
Rickettsia parkeri
Rickettsia peacockii
Rickettsia prowazekii
Rickettsia rhipicephali
Rickettsia rickettsii
Rickettsia sibirica
Rickettsia slovaca
Rickettsia tamurae
Rickettsia typhi
etc.


Rickettsea aeschlimannii
Rickettsiae africae
Rickettsea akari
Rickettsia asiatica
Rickettsia australis
Rickettsia canadensis
Rickettsia conorii
Rickettsia cooleyi
Rickettsia felis
Rickettsia heilongjiangensis
Rickettsia helvetica
Rickettsia honei
Rickettsia hulinii
Rickettsia japonica
Rickettsia massiliae
Rickettsia monacensis
Rickettsia montanensis
Rickettsia parkeri
Rickettsia peacockii
Rickettsia prowazekii
Rickettsia rhipicephali
Rickettsia rickettsii
Rickettsia sibirica
Rickettsia slovaca
Rickettsia tamurae
Rickettsia typhi
etc.

Rickettsia is a genus of nonmotile, gram-negative, nonspore-forming, highly pleomorphic bacteria that can be present as cocci (0.1 μm in diameter), rods (1–4 μm long), or thread-like (10 μm long). The term rickettsia, named after Howard Taylor Ricketts, is often used interchangeably for any member of the Rickettsiales. Being obligate intracellular parasites, the Rickettsia survival depends on entry, growth, and replication within the cytoplasm of eukaryotic host cells (typically endothelial cells).Rickettsia cannot live in artificial nutrient environments and is grown either in tissue or embryo cultures; typically, chicken embryos are used: a method developed by Ernest William Goodpasture and his colleagues at Vanderbilt University in the early 1930s.


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Wikipedia

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