inquilinus limosus inquilinus limosus inquilinus limosus is a bacterium first isolated from cystic fibrosis patients' lungs, and is rarely observed elsewhere, prompting extensive research into its biology. inquilinus limosus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodospirillales family: azospirillaceae genus: inquilinus species: i. limosus binomial name inquilinus limosuscoenye et al. 2002