According to UPI reports quoting the CDC, At least twenty-three people infected with a strain of E. coli O157:H7 with a particular "DNA fingerprint" have been reported from nine states. The illnesses appear to be associated with products subject to the recalls of 41,280 pounds of beef products from JBS Swift Beef Co. that may be contaminated with E. coli O157:H7. The recall was expanded June 28 to include 380,000 pounds of assorted pieces of beef — beef primal products — from the company.

Also, according to published reports, samples from unopened packages of ground beef recovered from a patient’s home were tested by the Michigan Public Health Laboratory and yielded an E. coli O157:H7 isolate that matched the "DNA fingerprint" of the outbreak strain, the CDC said.