Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to rickettsial: Rickettsia rickettsii


n. pl. rick·ett·si·ae (-sē-ē′)
Any of various bacteria of the genus Rickettsia, carried as parasites by many ticks, fleas, and lice, that cause diseases such as typhus and Rocky Mountain spotted fever in humans.

[New Latin Rickettsia, genus name, after Howard Taylor Ricketts (1871-1910), American pathologist.]

rick·ett′si·al adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.rickettsial - relating to or caused by rickettsias
References in periodicals archive ?
Based on elevated titers of IgG and IgM antibodies to both pathogens, physicians concluded the patient had concurrent RMSF and HME, 2 tick-borne rickettsial diseases effectively treated with doxycycline.
She includes bacterial, fungal, viral, rickettsial, protozoal, parasitic, endocrine, metabolic, allergic immune-medication, nutritional, congenital, and psychogenic skin diseases along with otitis externa, pigment abnormalities, alopecia, and keratinization conditions, and provides a full chapter on neoplastic as well as nonneoplastic tumors.
bellii was also the most common rickettsial species identified in ticks from the state of Rondonia, Western Amazon, it was only successfully isolated and established in continuous cell passages from Amblyomma scalpturatum (7) and in Amblyomma aureolatum, Amblyomma dubitatum, and Haemaphysalis juxtakochi in the state of Sao Paulo (10-12).
CSF findings in spotted fever group rickettsial disease are diverse: pleocytosis with predominant polymorphs (as in this case), predominance of eosinophils or predominance of lymphocytes.
While TBF was first described nearly 100 years ago, it has only recently been discovered that there are several rickettsial species transmitted in southern Africa, the most common of which is Rickettsia africae.
Although rickettsial species are arthropod-associated bacteria, they are also frequently capable of infecting vertebrates, including humans, usually as accidental hosts.
En Colombia hay descripciones recientes de enfermedad rickettsial por Rickettsia rickettsii, asociadas a casos fatales, de suerte que estas enfermedades febriles no son eventos nuevos en nuestro pais.
Wolbachia is a genus of rickettsial organisms, a microorganism positioned somewhere between viruses and true bacteria.
The genus Bartonella (formerly Rochalimaea) is a member of the rickettsial order of bacteria, and it is found worldwide.
Fever with rash suggests rickettsial infection, arbovirus infection (the most prominent being dengue), and measles.
Cutler of the CDC's division of viral and rickettsial diseases said in a presentation at the symposium, which was sponsored by the U.