Campylobacter fetus is a species of Gram-negative, motile bacteria with characteristic “S-shaped” rod morphology similar to members of the genus Vibrio. It is oxidase-positive like other members of the Campylobacter genus.
C. fetus can cause abortion in cattle and sheep as well as being an opportunistic human pathogen and can cause bacteremia and thrombophlebitis. It is rare but it can lead to fatal septicemia in newborns and immunocompromised individuals. The bacteria can lead to meninges in the brain, lungs, joints, the pericardial sac around the heart, or the peritoneum.