[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Proteobacteria" Garrity et al. 2005 stat. inval. see Phylum Pseudomonadota Garrity et al. 2021
       Class Epsilonproteobacteria Garrity et al. 2006
         Order Campylobacterales Garrity et al. 2006
           Family Campylobacteraceae Vandamme and De Ley 1991
             Genus Campylobacter Sebald and Véron 1963 (Approved Lists 1980)
               Campylobacter coli (Doyle 1948) Véron and Chatelain 1973 (Approved Lists 1980)