ε-变形菌是变形菌中的一类，与δ-变形菌关系最近。

医学导航：病菌

细菌（分类）

gr+f／gr+a（t）／gr-p（c／gr-o

药物（J1p、w、n、m、疫苗）

Epsilonproteobacteria are a class of Proteobacteria. All species of this class are, like all Proteobacteria, Gram-negative.

The Epsilonproteobacteria consist of few known genera, mainly the curved to spirilloid Wolinella spp., Helicobacter spp., and Campylobacter spp. Most of the known species inhabit the digestive tracts of animals and serve as symbionts (Wolinella spp. in cattle) or pathogens (Helicobacter spp. in the stomach, Campylobacter spp. in the duodenum).