@article{mbs:/content/journal/jmm/10.1099/00222615-35-2-107, author = "Chapman, P. A. and Siddons, Christine A. and Zadik, P. M. and Jewes, Linda", title = "An improved selective medium for the isolation of Escherichia coli O 157", journal= "Journal of Medical Microbiology", year = "1991", volume = "35", number = "2", pages = "107-110", doi = "https://doi.org/10.1099/00222615-35-2-107", url = "https://www.microbiologyresearch.org/content/journal/jmm/10.1099/00222615-35-2-107", publisher = "Microbiology Society", issn = "1473-5644", type = "Journal Article", abstract = " Summary. Sorbitol-MacConkey medium has become widely used for the isolation of verotoxigenic (VT+) Escherichia coli O157. However, many organisms other than VT+ E. coli O157, especially other serogroups of E. coli and Proteus spp., may not ferment sorbitol, and thus may be confused initially with VT+ E. coli O157. Rhamnose is not fermented by VT+ E. coli O157, but is by most sorbitol non-fermenting E. coli of other serogroups. Cefixime is a cephalosporin antibiotic that is more active against Proteus spp. than against E. coli. Inclusion of rhamnose and cefixime in sorbitol-MacConkey agar improves its selectivity for the isolation of VT+ E. coli O157.", }