Campylobacter are germs (campylobacter bacteria) that can cause an unpleasant bout of food poisoning. One of the most common strains in the group is Campylobacter jejuni. When eating or drinking something containing the campylobacter germs it cause illness, usually with gastroenteritis, an infection of the guts.
This is a companion discussion topic for the original article at https://patient.info/digestive-health/diarrhoea/campylobacter