Keywords: Ecoli O157 colonies.png Practically none of the E coli O157 H7 strains ferment D-sorbitol or do so very slowly; about 80 of other strains do ferment it Colonies of E coli O157 are colorless on Sorbitol MacConkey SMAC agar plates while non-O157 E coli colonies are pink http //www cdc gov/idsr/files/French_lab_manual_IDSR/chpt8 htm 2005-05-23 Centers for Disease Control and Prevention US Government Work PD-USGov Fermented food Original upload log wikitable - - 2006-10-28 18 00 25 360 × 227 50739 bytes InfoCan <nowiki> Practically none of the E coli O157 H7 strains ferment D-sorbitol or do so very slowly; about 80 of other strains do ferment it Colonies of E coli O157 are colorless on Sorbitol MacConkey SMAC agar plates while no</nowiki> |