legionella oakridgensis legionella oakridgensis legionella oakridgensis is a gram-negative bacterium from the genus legionella which was isolated from industrial cooling tower waters. it is pathogenic. genomic informationncbi genome id24057ploidyhaploidgenome size2.77 mbnumber of chromosomes1year of completion2013 legionella oakridgensis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: legionellales family: legionellaceae genus: legionella species: l. oakridgensis binomial name legionella oakridgensisorrison et al. 1983