Another  modified  Stuart  medium,  use  inorganic  phosphate  instead  of glycerophosphate that can be metabolized by some bacteria, and raise the pH to 8.4.The medium was effective in maintaining the viability of Salmonella and Shigella in fecal samples, and prevents bacterial overgrowth by Escherichia coli and Klebsiella aerogenes. In all cases, specimens should be cultivated as soon as possible or stored in the refrigerator if delay is unavoidable.