afipia birgiae afipia birgiae afipia birgiae is a species in the afipia bacterial genus. it is a gram-negative, oxidase-positive rod in the alpha-2 subgroup of the class proteobacteria. it is motile by means of a single flagellum. its type strain is 34632t (=cip 106344t =ccug 43108t). afipia birgiae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: nitrobacteraceae genus: afipia species: afipia birgiaela scola et al. 2002 afipia birgiae is a fastidious bacteria isolated from a hospital water supply in co-culture with amoebae. it is hypothesized that this group of bacteria are a potential cause of nosocomial infections.