e-Proteobacteria

Domain   Bacteria

Phylum    Proteobacteria

Class       e-proteobacteria

G-, slender rods helical or vibrioid (helical B. that does  not  have  complete  turn); chemoorganotrophs usu. asso. with digestive systems of humans/animals

                      Campylobacter
 
Domain  Bacteria
Phylum  Proteobacteria
Class    e-Proteobacteria
Order    Campylobacterales
Family   Campylobacteraceae
Genus   Campylobacter

G-, spiral, microaerophilic, Motile, uni- or bi-polar flagella,  curved, rod-like, oxidase-pos, C. jejuni  bacterial foodborne D. developed countries, dozen species Campylobacter  implicated  human D.,  C. jejuni and C. coli  most common.  C. fetus is cause of spontaneous abortions in cattle/sheep, opport. path. H.

                      Helicobacter

Domain   Bacteria
Phylum   Proteobacteria
Class      Epsilon Proteobacteria
Order     Campylobacterales
Family    Helicobacteraceae
Genus    Helicobacter

G-, helix, some species inhabit G.I. tract, liver mam/birds, H. pylori. most  comm.,  Some  path. ass. peptic ulcers, chronic gastritis, duodenitis, and stomach cancer, thrive in the very acidic mam. stomach by  enzyme urease which  raises pH locally