Common cause of bloody diarrhoea. As with other causes of bloody diarrhea, often associated with fever and abdominal cramps.
Usually self resolving within a week. Antibiotics help if symptoms severe enough.
Excretion continues for a number of weeks, although risk of spreading infection after diarrhoea has settled of course much less, assuming decent hygiene.
Chronic excretion can occur with continuous symptoms rarely, certainly in immunosuppressed patients. Asymptomatic carriers exist, although seems to be more common in developing countries (so malnutrition probably a factor) and reinfection can also occur, of course.
About 1 in 1000 cases develop Guillain Barre syndrome after the infection. Inflammatory bowel disease seems more common after campylobacter infection?