Campylobacteriosis usually occurs in single, sporadic cases, but it can also occur in outbreaks, when two or more people become ill from the same source. Most cases of campylobacteriosis are associated with eating raw or undercooked poultry meat or from cross-contamination of other foods by these items. Outbreaks of Campylobacter have most often been associated with unpasteurized dairy products, contaminated water, poultry, and produce. Animals can also be infected, and some people get infected from contact with the stool of an ill dog or cat. The organism is not usually spread from one person to another, but this can happen if the infected person is producing a large volume of diarrhea.
It only takes a very few Campylobacter organisms (fewer than 500) to make a person sick. Even one drop of juice from raw chicken meat can have enough Campylobacter in it to infect a person! One way to become infected is to cut poultry meat on a cutting board, and then use the unwashed cutting board or utensil to prepare vegetables or other raw or lightly cooked foods. The Campylobacter organisms from the raw meat can get onto the other foods