parabacteroides chongii parabacteroides chongii parabacteroides chongii is a gram-negative, obligate anaerobic, non-spore-forming, rod-shaped and non-motile bacterium from the genus of parabacteroides which has been isolated from blood of a person who suffered from peritonitis. parabacteroides chongii scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: "tannerellaceae" genus: parabacteroides species: p. chongii binomial name parabacteroides chongiikim et al. 2019 type strain ymc b3181