Campylobacter vs. Helicobacter — What's the Difference?

Campylobacter (meaning "curved bacteria") is a genus of Gram-negative bacteria. Campylobacter typically appear comma- or s-shaped, and are motile.

Helicobacter is a genus of Gram-negative bacteria possessing a characteristic helical shape. They were initially considered to be members of the genus Campylobacter, but in 1989, Goodwin et al.

Any bacteria of the genus Campylobacter; a principal cause of food poisoning

Any member of the Helicobacter bacteria.