Campylobacter jejuni and Salmonella spp are the most frequently cultured micro-organisms in infectious gastroenteritis among patients hospitalized at the departments of gastroenterology and geriatrics. As a whole, the hospitalized patient population with Campylobacter gastroenteritis is a younger one, compared to the Salmonella-infected group. Both pathogens can be associated with a biochemical pancreatitis, which is usually without clinical importance. However, serious complications can occur, with a predominance of visceritis for C. jejuni, and renal function impairment for Salmonella spp. Finally, an asymptomatic carrier state is well known in the Salmonella infection spectrum, whereas C. jejuni might cause a recurrent disease in some patients.