Definition of Rickettsia

1. Noun. Any of a group of very small rod-shaped bacteria that live in biting arthropods (as ticks and mites) and cause disease in vertebrate hosts; they cause typhus and other febrile diseases in human beings.

Generic synonyms: Eubacteria, Eubacterium, True Bacteria
Group relationships: Family Rickettsiaceae, Rickettsiaceae
Derivative terms: Rickettsial

Definition of Rickettsia

1. Noun. Any of a group of gram-negative bacteria, of the genus ''Rickettsia'', carried as parasites by ticks, fleas and lice; they cause typhus and other diseases ¹

¹ Source:

Definition of Rickettsia

1. [n -SIAE or -SIAS]

Medical Definition of Rickettsia

1. A member of a group of microorganisms that (like viruses) require other living cells for growth but (like bacteria) use oxygen, have metabolic enzymes and cell walls, and are susceptible to antibiotics. Rickettsiae cause a series of diseases (see rickettsial diseases). (12 Dec 1998)

Rickettsia Pictures

Click the following link to bring up a new window with an automated collection of images related to the term: Rickettsia Images

Lexicographical Neighbors of Rickettsia

rickettsia (current term)
rickettsia infections
rickettsia prowazekii
rickettsia rickettsii
rickettsia tsutsugamushi
rickettsia typhi
rickettsia vaccine
rickettsiaceae infections
rickettsial disease
rickettsial diseases
rickettsial vaccines

Literary usage of Rickettsia

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Harvey Lectures by Harvey Society of New York, New York Academy of Medicine (1922)
"with rickettsia long after his recovery, as late as September, four months after the attack and three months after the disappearance of all symptoms. ..."

2. The Etiology and Pathology of Typhus: Being the Main Report of the Typhus by Simeon Burt Wolbach, John Launcelot. Todd, Francis Winslow Palfrey (1922)
"rickettsia AND TRENCH FEVER Our control work with lice in Warsaw demonstrated the common (12 in 148) occurrence of exclusively extracellular rickettsia in ..."

3. Contributions to Medical and Biological Research by William Osler (1919)
"He, therefore, proposed for them the name of rickettsia prowazeki (ngnsp. ... For this second form Rocha-Lima proposed the name of rickettsia ..."

4. A Textbook of bacteriology: A Practical Treatise for Students and by Hans Zinsser, Frederick Fuller Russell (1922)
"The sub-classification of the rickettsia has been tentatively attempted by Wolbach by whose courtesy we are enabled to insert the following table: ..."

5. Typhus Fever with Particular Reference to the Serbian Epidemic by Richard Pearson Strong (1921)
"THE SIGNIFICANCE OF rickettsia IN RELATION TO DISEASE In 1916 Rocha-Lima called ... He therefore proposed for them the name of rickettsia prowazeki (ngnsp. ..."

6. Animal Parasites and Human Disease by Asa Crawford Chandler (1922)
"rickettsia-Like Organisms Within the past few years there have been ... Species of rickettsia or closely allied forms have been found in human lice ..."

7. Biosafety in the Laboratory: Prudent Practices for the Handling and Disposal by National Research Council (U. S.) (1989)
"Agent: rickettsia prowazekii, rickettsia typhi (R. mooseri), rickettsia tsutsugamushi, ... Agent: rickettsia rickettsii Rocky Mountain spotted fever is a ..."

8. Biosafety in Microbiological and Biomedical Laboratories edited by Jonathan Y. Richmond, Robert W. McKinney (1994)
"Agent: rickettsia prowazekii, rickettsia typhi (R. mooseri), rickettsia tsutsugamushi, rickettsia Canada, and Spotted Fever Group agents of human disease; ..."

Other Resources Relating to: Rickettsia

Search for Rickettsia on!Search for Rickettsia on!Search for Rickettsia on Google!Search for Rickettsia on Wikipedia!