The U.S. Centers for Disease Control is reporting that as of September 11, 2012, a total of 14 persons infected with the outbreak strain of Listeria monocytogenes have been reported from 11 states and the District of Columbia.

All 14 ill persons have been hospitalized. Three deaths have been reported. Listeriosis contributed to at least one of these deaths.

Collaborative investigation efforts of local, state, and federal public health and regulatory agencies indicate that imported ricotta salata cheese is the likely source of this outbreak.

The U.S. Food and Drug Administration identified the outbreak strain of Listeria monocytogenes bacteria in a sample of uncut imported Frescolina brand ricotta salata cheese distributed by Forever Cheese, Inc. FDA is working closely with CDC, the firm involved, and public health authorities in states where illnesses occurred to determine the exact cause of contamination.