| Cross Index | Rickettsia |
| SuperSet | Prokaryote, Eubacteria Rickettsiae & Chlyamdiae |
| Compare | Rickkettsiaceae: Cowdria, Coxiella,
Erhlichia, Neorickettsia,
Rickettsia,
Rickettsiella, Rochalimaea
Wobachia Bartonellaceae: Bartonella, Grahamella Anaplasmatacae: Aegyptianella, Anaplasma, Eperythrozoan, Haemobartonella |
| Contrast | Archaea |
| Subset |
| Morphology | Rickettsia |
| CELLULAR |
| Staining | Short rods, 0.3-0.5 um in diameter and 0.8-2.0 um in length, sometimes longer when cell division is impaired. Often surrounded by protein microcapsular layer and slime layer. Gram-negative. Retain basic fuchsin when stained by the method of Gimnez. Non-motile; flagella do not occur. Aerobic. Have not been cultivated in the absence of host cells. Growth occurs in the cytoplasm, sometimes in the nucleus, of certain vertebrate and arthropod cells. Do not grow in phagocytic vacuoles. Generally unstable when separated from host components; stability enhanced by certain proteins, sucrose, and reagents that tend to maintain the integrity of outer membranes and ATP level. Best preserved by rapid freezing and storage below - 50`C. Rapidly inactivated at 56`C. Derive energy from the metabolism of glutamate via the citric acid cycle, but do not utilize glucose. Transport and metabolize phosphorylated compounds, but do not synthesize or degrade nucleoside monophosphates. Natural cycle generally involves a vertebrate and an invertebrate host. Etiological agents of human diseases, such as typhus, spotted fever, or scrub typhus. |
| Morphology | |
| Motility | |
| Specialized structures |
| Division |
| COLONIAL |
| Solid surface |
| Liquid |
| Growth Parameters | Rickettsia |
| PHYSIOLOGICAL |
| Tropism | |
| Oxygen | |
| pH | |
| Temperature | |
| Requirements | |
| Products | |
| Enzymes | |
| Unique features |
| ENVIRONMENTAL |
| Habitat | |
| Lifestyle | |
| Pathogenicity |
| Distribution |
| Genome | Rickettsia |
| G+C Mol % | The mol% G + C of the DNA is 29-33 (Tm, Bd). |
| Reference | Rickettsia |
| First citation | |
| Emended | |
| The Prokaryotes | P |
| Bergey's Systematatic |
| References |
| Cross Index | Rickettsiella |
| SuperSet | Prokaryote Eubacteria, |
| Compare | |
| Contrast | Archeo |
| Subset |
| Morphology | Rickettsiella |
| CELLULAR |
| Staining | The infectious forms are Gram-negative rod- or disk-shaped organisms, usually smaller than those of the genus Rickettsia, but developing intracellularly into larger particles that multiply and reform the smaller forms in a cycle that resembles that of Chlamydia. Sometimes produce or induce the formation of large crystalline bodies. Growth takes place in cell vacuoles of the fat body, hepatopancreas, and other organs of invertebrate hosts. In some instances they have been cultivated in invertebrates other than the host of origin and rarely and only for a few passages in vertebrate and invertebrate cell cultures. Have not been grown in cell-free media. Pathogenic for their larval hosts and young and mature stages of other invertebrate hosts, but of little virulence for vertebrates. Natural hosts include insects, crustaceans, and arachnids. |
| Morphology | |
| Motility | |
| Specialized structures |
| Division |
| COLONIAL |
| Solid surface |
| Liquid |
| Growth Parameters | Rickettsiella |
| PHYSIOLOGICAL |
| Tropism | |
| Oxygen | |
| pH | |
| Temperature | |
| Requirements | |
| Products | |
| Enzymes | |
| Unique features |
| ENVIRONMENTAL | Rickettsiella |
| Habitat | |
| Lifestyle | |
| Pathogenicity |
| Distribution |
| Genome | Rickettsiella |
| G+C Mol % |
| Reference | Rickettsiella |
| First citation | da Rocha-Lima, H. 1916 Zur aetiologie des Fleckfiebers. Berlin Klin Wochenscr 53: 567-569 |
| The Prokaryotes | P |
| Bergey's Systematatic | p 688 E. Weiss and J.W. Moulder |
| References |