STX2 and hemolytic-uremic syndrome: In this study, EAEC Stx2a+ O104:H4 isolates obtained from stool samples of a HUS patient and her friend, traveling together to Turkey in 2013, were characterized and compared with the 2011 German EAEC Stx2a+ O104:H4 outbreak isolates and with two isolates from cases of bloody diarrhea that occurred in the Republic of Georgia in 2009.