72 persons infected with a strain of E. coli O157:H7 with a particular DNA fingerprint have been reported from 30 states. Of these, 51 have been confirmed by an advanced DNA test as having the outbreak strain; these confirmatory test results are pending on the others. The number of ill persons identified in each state is as follows: Arizona (2), California (3), Colorado (6), Connecticut (1), Delaware (1), Georgia (1), Iowa (2), Illinois (5), Kentucky (2), Massachusetts (4), Maryland (2), Maine (3), Minnesota (6), Missouri (1), Montana (1), North Carolina (2), New Hampshire (2), New Jersey (1), Nevada (2), New York (1), Ohio (3), Oklahoma (1), Oregon (1), Pennsylvania (2), South Carolina (1), Texas (3), Utah (4), Virginia (2), Washington (6), and Wisconsin (1).

Ill persons range in age from 2 to 65 years; however, 65% are less than 19 years old; 71% are female. Thirty-four persons have been hospitalized, 10 developed hemolytic uremic syndrome (HUS); none have died. Reports of these infections increased above the expected baseline in May and continue into June.