legionella lytica legionella lytica legionella lytica is a gram-negative bacterium from the genus legionella. legionella lytica scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: legionellales family: legionellaceae genus: legionella species: l. lytica binomial name legionella lyticahookey et al. 1996 type strain ccug 112, pcm 2298, l2 synonyms sarcobium lyticum