Coxiella refers to a genus of Gram-negative
Gram-negative bacteria are bacteria that do not retain crystal violet dye in the Gram staining protocol. In a Gram stain test, a counterstain is added after the crystal violet, coloring all Gram-negative bacteria with a red or pink color...

Bacteria are a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals...

 in the family Coxiellaceae
Coxiellaceae is a family in the order Legionellales.Coxiella burnetii is a species in this order.Another is Rickettsiella melolonthae....

. It is named after Harold Herald Rea Cox (1907–1986)
H. R. Cox
Herald Rea Cox was an American bacteriologist. Born in Terre Haute, Indiana, he graduated from Indiana State Normal School, now Indiana State University, in 1928 before obtaining his doctorate from the Johns Hopkins Bloomberg School of Public Health....

, an American bacteriologist. Coxiella burnetii
Coxiella burnetii
Coxiella burnetii is an obligate intracellular bacterial pathogen, and is the causative agent of Q fever. The genus Coxiella is morphologically similar to Rickettsia, but with a variety of genetic and physiological differences. C...

is the only member of this genus. It is one of the Gammaproteobacteria
Gammaproteobacteria is a class of several medically, ecologically and scientifically important groups of bacteria, such as the Enterobacteriaceae , Vibrionaceae and Pseudomonadaceae. An exceeding number of important pathogens belongs to this class, e.g...


It is an intracellular bacteria and it survives within the Phagolysosome
A phagolysosome is the membrane-enclosed organelle which forms when a phagosome fuses with a lysosome. After fusion, the food particles or pathogens contained within the phagosome are usually digested by the enzymes contained within the lysosome. Phagolysosome formation follows phagocytosis...


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