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Classification and external resources
ICD-10 A75.-A79.
eMedicine ped/2015
MeSH D012288

A rickettsiosis is a disease caused by intracellular bacteria.

In the past, rickettsioses were considered to be caused by species of Rickettsia.[1] However, scrub typhus is still considered a rickettsiosis, even though the causative organism has been reclassified from Rickettsia tsutsugamushi to Orientia tsutsugamushi.

Examples of rickettsioses include typhus, both endemic and epidemic, Rocky Mountain spotted fever, and Rickettsialpox.

Rickettsioses can be divided into a spotted fever group (SPG) and typhus group (TG).[2]

Organisms involved include Rickettsia parkeri.[3]

Many new causative organisms have been identified in the last few decades.[4]

Most are in the genus Rickettsia, but scrub typhus is in the genus Orientia.[5]

It has been predicted that global warming may lead to greater incidence.[6]

When the term "x" is used,

Rickettsia, Orientia, Ehrlichia, Anaplasma, Neo-rickettsia, Coxiella, and Bartonella


Doxycycline has been used in the treatment of rickettsial infection.[7]


  1. ^ Raoult D, Roux V (October 1997). "Rickettsioses as paradigms of new or emerging infectious diseases". Clin. Microbiol. Rev. 10 (4): 694–719. PMID 9336669. PMC 172941. 
  2. ^ Choi YJ, Jang WJ, Ryu JS, et al. (February 2005). "Spotted fever group and typhus group rickettsioses in humans, South Korea". Emerging Infect. Dis. 11 (2): 237–44. PMID 15752441. 
  3. ^ Paddock CD, Finley RW, Wright CS, et al. (November 2008). "Rickettsia parkeri rickettsiosis and its clinical distinction from Rocky Mountain spotted fever". Clin. Infect. Dis. 47 (9): 1188–96. doi:10.1086/592254. PMID 18808353. 
  4. ^ Parola P, Paddock CD, Raoult D (October 2005). "Tick-borne rickettsioses around the world: emerging diseases challenging old concepts". Clin. Microbiol. Rev. 18 (4): 719–56. doi:10.1128/CMR.18.4.719-756.2005. PMID 16223955. PMC 1265907. 
  5. ^ Unsworth NB, Stenos J, Faa AG, Graves SR (July 2007). "Three rickettsioses, Darnley Island, Australia". Emerging Infect. Dis. 13 (7): 1105–7. PMID 18214193. 
  6. ^ Parola P, Socolovschi C, Jeanjean L, et al. (2008). "Warmer weather linked to tick attack and emergence of severe rickettsioses". PLoS Negl Trop Dis 2 (11): e338. doi:10.1371/journal.pntd.0000338. PMID 19015724. 
  7. ^ "eMedicine - Rickettsial Infection : Article by Mobeen H Rathore". 


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