helicobacter rodentium helicobacter rodentium helicobacter rodentium is a bacterium in the helicobacteraceae family, campylobacterales order. it is a spiral-shaped bacterium with a bipolar, single, nonsheathed flagellum. it is resistant to cephalothin and nalidixic acid. its type strain is mit 95-1707 (= atcc 700285). its name refers to the species first being isolated from mice. helicobacter rodentium scientific classification domain: bacteria phylum: campylobacterota class: "campylobacteria" order: campylobacterales family: helicobacteraceae genus: helicobacter species: h. rodentium binomial name helicobacter rodentiumshen et al., 1997