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Rickettsia rickettsii is a Gram-negative, intracellular, coccobacillus bacterium that was first discovered in 1902. [1] . Having a reduced genome, the bacterium harvests nutrients from its host cell to carry out respiration, making it an organoheterotroph.
Rickettsia rickettsii (Western Hemisphere) Rocky Mountain spotted fever. Rickettsia akari (USA, former Soviet Union) Rickettsialpox. Rickettsia conorii (Mediterranean countries, Africa, Southwest Asia, India) Boutonneuse fever. Rickettsia sibirica (Siberia, Mongolia, northern China) Siberian tick typhus or North Asian tick typhus. Rickettsia ...
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Jul 17, 2023 · Rocky Mountain spotted fever (RMSF) is an acute febrile tick-borne illness caused by Rickettsia rickettsii. In North America, it is both the most severe and the most common rickettsial infection. Without prompt antibiotic treatment, mortality rates are as high as 20 to 30 percent.
- Jessica Snowden, Kari A. Simonsen
- 2023/07/17
Mar 30, 2021 · The Rickettsia genus has extraordinary diversity at the species level, with members found in freshwater, marine and terrestrial ecosystems (Weinert 2015). Rickettsia species also exhibit a fairly broad host range. While most are associated with arthropods (e.g. ticks, lice, mites and fleas), some species are associated with hosts including ...
- Jon McGinn, Rebecca L Lamason
- 10.1093/femspd/ftab019
- 2021
- Pathog Dis. 2021 Jun; 79(4): ftab019.
The Rickettsiaceae are a family of bacteria. The genus Rickettsia is the most prominent genus within the family. The bacteria that eventually formed the mitochondrion (an organelle in eukaryotic cells) is believed to have originated from this family. Most human pathogens in this family are in genus Rickettsia. They spend part of their lifecycle ...
Rickettsia are small (0.3 to 0.5 by 0.8 to 2.0 μm), obligately intracellular Gram negative bacilli. They reside in the host cell cytosol and have active transport systems to utilize the host cell’s adenosine triphosphate, amino acids, and phosphorylated sugars. These organisms have small (1.1–1.5 Mb) genomes, which have evolved through ...
Mar 9, 2022 · 9 Altmetric. Metrics. Abstract. Rickettsia species are endosymbionts hosted by arthropods and are known to cause mild to fatal diseases in humans. Here, we analyse the evolution and diversity of...
