Campylobacter jejuni is one of the world's major food poisoning bacteria. British scientists have recently determined its entire genetic make up, which should lead to an understanding of the mechanism of Campylobacter virulence as well as strategies to control it.Campylobacter jejuni has been taken seriously as a food pathogen only since the 1970's, but it is probably responsible for maybe twice as many cases of reported enteritis than the better known Salmonella.