legionella saoudiensis legionella saoudiensis legionella saoudiensis is a gram-negative bacterium from the genus legionella which has been isolated from sewage water from jeddah in saudi arabia. legionella saoudiensis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: legionellales family: legionellaceae genus: legionella species: l. saoudiensis binomial name legionella saoudiensisbajrai et al. 2016 type strain csur p2101, dsm 101682, lh-swc, ls-1