Legionellaceae

Legionellales

Legionella sp. under ultraviolet illumination
Scientific classification
Domain:	Bacteria
Phylum:	Proteobacteria
Class:	Gammaproteobacteria
Order:	Legionellales
Families and genera
Legionellaceae Fluoribacter Legionella Sarcobium Coxiellaceae Aquicella Coxiella Rickettsiella

The Legionellales are an order of Proteobacteria. Like all Proteobacteria, they are Gram-negative. They comprise two families, typified by Legionella and Coxiella, both of which include notable pathogens. For example, Q fever is caused by Coxiella burnetii and Legionella pneumophila causes Legionnaires' disease.