Is used with the addition of Novobiocin for the pre-enrichment of E. coli 0157:H7. The modification within this medium is a reduction of Bile Salts No. 3 in relation to the standard EC Medium developed by Hajna and Perryl. It remains a buffered Lactose broth containing Bile Salts to inihibit Gram-positive bacteria and spore-forming microorganisms, but also contains Novobiocin, which is found to be beneficial in the enrichment and detection of E. coli 0157:H7.