Definitions for Rickettsia
rɪˈkɛt si ə; -siˌirick·ettsi·a

Princeton's WordNetRate this definition:0.0 / 0 votes

1. rickettsianoun

   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

WiktionaryRate this definition:0.0 / 0 votes

1. rickettsianoun

   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

2. Etymology: From Rickettsia (genus name)

ChatGPTRate this definition:0.0 / 0 votes

1. rickettsia

   Rickettsia is a genus of non-motile, gram-negative, non-spore-forming, highly pleomorphic bacteria that can present as cocci, rods or thread-like. These bacteria are obligate intracellular parasites, meaning they can only survive within the cells of their hosts - usually invertebrates like arachnids and insects, and mammals including humans. Rickettsia species cause diseases such as typhus and Rocky Mountain spotted fever in humans, which are usually transmitted through the bite of infected insects or ticks.

WikidataRate this definition:0.0 / 0 votes

1. Rickettsia

   Rickettsia is a genus of non-motile, Gram-negative, non-sporeforming, highly pleomorphic bacteria that can present as cocci, rods or thread-like. Being obligate intracellular parasites, the Rickettsia survival depends on entry, growth, and replication within the cytoplasm of eukaryotic host cells. Because of this, Rickettsia cannot live in artificial nutrient environments and are grown either in tissue or embryo cultures. In the past they were positioned somewhere between viruses and true bacteria. However unlike Chlamydia, Mycoplasma, and Ureaplasma, Rickettsial organisms possess true cell walls similar to other gram-negative bacteria. The majority of Rickettsia bacteria are susceptible to antibiotics of the tetracycline group. Despite the similar name, Rickettsia bacteria do not cause rickets, which is a result of vitamin D deficiency. Rickettsia species are carried by many ticks, fleas, and lice, and cause diseases in humans such as typhus, rickettsialpox, Boutonneuse fever, African tick bite fever, Rocky Mountain spotted fever, Flinders Island spotted fever and Queensland tick typhus. They have also been associated with a range of plant diseases. The name rickettsia is often used for any member of the Rickettsiales. They are one of closest living relatives to bacteria that were the origin of the mitochondria organelle that exists inside most eukaryotic cells.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Rickettsia

   A genus of gram-negative, aerobic, rod-shaped bacteria often surrounded by a protein microcapsular layer and slime layer. The natural cycle of its organisms generally involves a vertebrate and an invertebrate host. Species of the genus are the etiological agents of human diseases, such as typhus.

Matched Categories

1. • Eubacteria

Usage in printed sourcesFrom: 

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How to pronounce Rickettsia?

1. Alex

   US English

   David

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   Mark

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   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

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   Veena

   Indian

   Priya

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   Neerja

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   Zira

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   Oliver

   British

   Wendy

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   Fred

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   Tessa

   South African

How to say Rickettsia in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of Rickettsia in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of Rickettsia in Pythagorean Numerology is: 7

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=Rickettsia
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Rickettsia
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Rickettsia
5. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=Rickettsia