https://wikimd.org/index.php?action=history&feed=atom&title=Rickettsia_australis 2026-04-28T07:55:21Z Revision history for this page on the wiki MediaWiki 1.44.2 https://wikimd.org/index.php?title=Rickettsia_australis&diff=5335063&oldid=prev 2024-02-29T17:04:42Z

<p>CSV import</p> <p><b>New page</b></p><div>&#039;&#039;&#039;Rickettsia australis&#039;&#039;&#039; is a species of [[bacteria]] in the genus [[Rickettsia]]. It is the causative agent of a condition known as [[Queensland tick typhus]], a disease primarily found in [[Australia]] and transmitted through the bite of infected [[ticks]].<br /> <br /> == Taxonomy ==<br /> Rickettsia australis belongs to the genus Rickettsia, which is a part of the phylum [[Proteobacteria]], class [[Alphaproteobacteria]], and order [[Rickettsiales]]. The genus Rickettsia is further divided into four groups: spotted fever, typhus, ancestral, and transitional. Rickettsia australis is a member of the spotted fever group.<br /> <br /> == Morphology ==<br /> Like other members of the genus Rickettsia, Rickettsia australis is a small, rod-shaped bacterium. It is [[Gram-negative]], meaning it does not retain the crystal violet stain used in the [[Gram stain]] procedure, but is instead colored red or pink.<br /> <br /> == Pathogenesis ==<br /> Rickettsia australis is the causative agent of Queensland tick typhus, a condition characterized by fever, headache, and a rash. The bacterium is transmitted to humans through the bite of an infected tick, specifically the species [[Ixodes holocyclus]] and [[Amblyomma triguttatum]]. Once in the human body, the bacteria invade the [[endothelial cells]] lining the blood vessels, leading to [[vasculitis]].<br /> <br /> == Diagnosis and Treatment ==<br /> Diagnosis of Queensland tick typhus is typically based on clinical symptoms and a history of tick exposure. Laboratory testing can confirm the diagnosis, with [[serology]] being the most commonly used method. Treatment typically involves the use of [[antibiotics]], with [[doxycycline]] being the drug of choice.<br /> <br /> == Epidemiology ==<br /> Queensland tick typhus is primarily found in the eastern coastal regions of Australia, particularly in the states of [[Queensland]] and [[New South Wales]]. The disease is most common during the warmer months when ticks are most active.<br /> <br /> == See Also ==<br /> * [[Rickettsia rickettsii]]<br /> * [[Rickettsia conorii]]<br /> * [[Rickettsia sibirica]]<br /> * [[Rickettsia africae]]<br /> <br /> == References ==<br /> &lt;references /&gt;<br /> <br /> [[Category:Bacteria]]<br /> [[Category:Rickettsiales]]<br /> [[Category:Tick-borne diseases]]<br /> {{Bacteria-stub}}<br /> {{Medicine-stub}}</div>

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