A quick review of this Gram negative rod -Campylobacter on A4Medicine. Campylobacter infections are sporadic with most cases associated with consuming raw milk or untreated water. C jejuni is the most common bacterial cause of human gastroenteritis. The pathogenesis of Campylobacter infection is discussed – it can cause both inflammatory and noninflammatory diarrhoea.The presentation can be with abdominal pain, profuse diarrhoea and prodromal symptoms. The disease is usually self-limiting but differentiation from salmonella or shigella can be difficult. The GP should note that the possible complications can be reactive arthritis and Guillain Barre Syndrome. A box displaying clearly referral criteria for admission helps the grclinician formulate a practical management plan.