legionella adelaidensis legionella adelaidensis legionella adelaidensis is a gram-negative, non-spore-forming, aerobic bacterium from the genus legionella which was isolated from cooling tower water in adelaide in south australia. legionella adelaidensis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: legionellales family: legionellaceae genus: legionella species: l. adelaidensis binomial name legionella adelaidensisbenson et al. 1991 type strain 1762-aus-e, atcc 49625, ccug 31231 a, cdc 1762-aus-e, cip 103645, dsm 19888, nctc 12735