Infection is most common in puppies and kittens, but Campylobacter spp.
Epidemiologically, living with dogs and cats has been documented to be a specific risk factor for Campylobacter infection. Infection of humans can occur via direct contact with animal feces or, much more commonly, via ingestion of contaminated, undercooked meat or raw milk. If the meat is thoroughly cooked, it poses no risk. A concern above and beyond the frequency of contamination is the occurrence of antibiotic-resistance among Campylobacter isolates from poultry. The incubation time is inversely related to the inoculum dose.