Hassan, Hosni M. (Raleigh, NC, US), Fink, Ryan C. (Naples, FL, US), Evans, Matthew R. (Raleigh, NC, US) 2010 ATTENUATED FNR DEFICIENT ENTEROBACTERIA United States NORTH CAROLINA STATE UNIVERSITY 20100255036 http://www.freepatentsonline.com/y2010/0255036.html