Rickettsia - Wikipedia
Rickettsia is a genus of nonmotile, gram-negative, nonspore-forming, highly pleomorphic bacteria that may occur in the forms of cocci (0.1 μm in diameter), bacilli (1–4 μm long), or threads (up …
Rickettsial Diseases | CDC Yellow Book 2024 - Centers for Disease ...
Rickettsial infections are caused by various bacteria within 6 genera of the order Rickettsiales: Rickettsia, Orientia, Anaplasma, Ehrlichia, Neoehrlichia, and Neorickettsia (Table 5-04).
What Are Rickettsial Diseases? - WebMD
2024年9月21日 · Of the 800 species of ticks in the world, less than 60 species transmit bacteria when they bite. One group of bacteria ticks carry is called rickettsiae. That’s why these tick …
Rickettsial Infection - StatPearls - NCBI Bookshelf
2023年7月17日 · Rickettsial infections are caused by a variety of obligate intracellular bacteria in the genus Rickettsia and are grouped into one of four categories: spotted fever group, typhus …
Overview of Rickettsial Infections - The Merck Manuals
Rickettsial infections and related infections (such as anaplasmosis, ehrlichiosis, and Q fever) are caused by an unusual type of bacteria that can live only inside the cells of another organism. …
Rickettsia | Definition, Genera, Characteristics, & Diseases
Rickettsia, family of bacteria, made up of two genera, Rickettsia and Orientia. The term rickettsia is sometimes also used to refer to organisms of the order Rickettsiales. Learn more about …
Rickettsiae - Medical Microbiology - NCBI Bookshelf
The rickettsiae are a diverse collection of obligately intracellular Gram-negative bacteria found in ticks, lice, fleas, mites, chiggers, and mammals. They include the genera Rickettsiae, …
Rickettsia - an overview | ScienceDirect Topics
Rickettsia are obligate intracellular pathogens that are taken up by macrophages and replicate in endothelial tissues, causing vasculitis. They are generally zoonoses with mammalian …
The Rickettsioses: A Practical Update - PMC
Rickettsia are small, obligately intracellular Gram negative bacilli. They are distributed among a variety of hematophagous arthropod vectors and cause illness throughout the world. …
The enigmatic biology of rickettsiae: recent advances, open …
Rickettsiae are obligate intracellular bacteria that can cause life-threatening illnesses and are among the oldest known vector-borne pathogens. Members of this genus are extraordinarily …