A total of 12 persons infected with the outbreak strain of E. coli O157:H7 were reported from 4 states. The number of ill persons reported from each state was as follows: Massachusetts (1), Michigan (5), Missouri (1), and Ohio (5).  58% of ill persons were hospitalized. No ill persons developed hemolytic uremic syndrome (HUS), and no deaths were reported.

Epidemiologic and traceback investigations conducted by local, state, and federal officials indicated that contaminated ground beef produced by Wolverine Packing Company was the likely source of this outbreak of STEC O157:H7 infections.

On May 19, 2014, Wolverine Packing Company recalled approximately 1.8 million pounds of ground beef products that may be contaminated with STEC O157:H7.  The products subject to recall bear the establishment number “EST. 2574B.”  The recalled ground beef was shipped to distributors for retail and restaurant use nationwide. There was no distribution of the products to the U.S. Department of Defense, the National School Lunch Program, or catalog/internet sales.  The recalled ground beef was also distributed to a limited number of retail establishments for consumer purchase.  Read the full list of products that were recalled.