flexivirga caeni flexivirga caeni flexivirga caeni is a gram-positive, strictly aerobic, non-spore-forming and non-motile bacterium from the genus flexivirga which has been isolated from activated sludge. flexivirga caeni scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: dermacoccaceae genus: flexivirga species: f. caeni binomial name flexivirga caenikeum et al. 2020 type strain bo-16kacc 19647lmg 30859