All are true about EHEC, except:
Sereny Test is given only by EIEC. Ref: Text Book of Microbilogy By Ananthanarayan, 6th Edition, Page 257 ; Harrison's Principles of Internal Medicine, 14th Edition, Page 938 and 15th Edition, Page 955
Sereny test is positive
Ferments sorbitol
Causes HUS
Elaborates shiga like exotoxin