Verocytotxin producing Escherichia coli (VTEC), and in particular, strains of serogroup o157, have emerged as significant pathogens causing a range of severe and potentially fatal illnesses. The European Union has recognised the threat posed by E. coli O157: H7 and the need to devise control strategies based on an understanding of VTEC pathogenicity, transmission, survival and growth. It also acknowledges the imortance of informing farmers,...