helicobacter acinonychis helicobacter acinonychis helicobacter acinonychis is a bacterium in the helicobacteraceae family, campylobacterales order. it was first isolated from cheetahs (acinonyx jubatus) with gastritis, so has been associated with this disease in this particular species and others of its kind. it is gram-negative, spiral-shaped, and grows under microaerophilic conditions. the type strain is 90-119 (ccug 29263, atcc 51101). helicobacter acinonychis scientific classification domain: bacteria phylum: campylobacterota class: "campylobacteria" order: campylobacterales family: helicobacteraceae genus: helicobacter species: h. acinonychis binomial name helicobacter acinonychiscorrig. eaton et al. 1993