nitratifractor nitratifractor nitratifractor is a genus of bacteria from the order campylobacterales, with one known species (nitratifractor salsuginis). nitratifractor scientific classification domain: bacteria phylum: campylobacterota class: "campylobacteria" order: campylobacterales family: incertae sedis genus: nitratifractornakagawa et al. 2005 type species nitratifractor salsuginis species n. salsuginis