ESCHERICHIA COLI ISOLATED FROM CATTLE AT

The clinical importance of verocytotoxin-producing Escherichia coli (VTEC) was fi rst recognised in the U.S.A. in 1982, when E. coli O157:H7 infection was associated to an outbreak of haemorrhagic colitis due to the consumption of ground beef (Riley et al., 1983). Since then, numerous epidemiological studies have bee