Some of the most common Epsilonproteobacteria include species of spirilloid Wolinella, Campylobacter species as well as Helicobacter species. Campylobacter bacteria and Helicobacter have been associated with a number of diseases that affect human beings and thus make up clinically relevant genera.How do Epsilonproteobacteria meet their energy needs?
The Epsilonproteobacteria found at deep-sea hydrothermal vents characteristically exhibit chemolithotrophy, meeting their energy needs by oxidizing reduced sulfur, formate, or hydrogen coupled to the reduction of nitrate or oxygen.Should Epsilonproteobacteria be reassigned to a novel phylum?
Based on the assessment of nearly 300 phylogenetic tree topologies, we conclude that the continued inclusion of Epsilonproteobacteria within the Proteobacteria is not warranted, and that this group should be reassigned to a novel phylum for which we propose the name Epsilonbacteraeota (phyl. nov.).How abundant are Epsilonproteobacteria in Parker and cesspool caves?
Epsilonproteobacterial abundance estimates from 16S rRNA clone libraries in Parker and Cesspool Caves, at 73% and 47% “Epsilonprotoebacteria,” respectively, are similar to the FISH biovolume values for LKC group I and group II (5, 14).