Rank: Genus
Lineage: Bacteria;Proteobacteria;Gammaproteobacteria;Legionellales;Legionellaceae;Legionella
Description: Legionella is related to the genus Coxiella. Legionella is best known for causing Legionnaire's disease. The bacteria are ubiquitous. Although largely aquatic, they can thrive in areas other than lakes and streams. Legionella has a bad reputation because of its pathogenicity, although complete recovery from Legionnaire's is probable upon proper diagnosis.
Reference Material:
https://microbewiki.kenyon.edu/index.php/Legionella