A selective supplement recommended by ISO Committee for the isolation of Escherichia coli 0157:H7.
Tellurite-Cefixime Supplement is used with MacConkey Sorbitol Agar Base for isolation and detection of Escherichia coli 0157:H7. Cefixime and Potassium tellurite inhibit the growth of non 0157 E. coli and other sorbitol nonfermenting enteric gram-negative bacilli. Sorbitol is fermented by strains of E. coli other than serotype O157:H7, producing colonies that are pink; colonies of E. coli 0157:H7 are colourless.
Each vial, sufficient for 500 mL medium contains:
Potassium tellurite 1.250 mg
Cefixime 0.025 mg
