Tergitol 7-lactose TTC agar (according to DIN EN ISO 9308-1)

Enumerate and differentiate coliforms from water and food samples with ready-to-use Thermo Scientific™ Oxoid™ Tergitol™ 7-Lactose-TTC Agar. Tergitol 7 inhibits Gram-positive organisms allowing superior recovery of coliforms. The addition of tri-phenyltetrazolium chloride (TTC) allows recognition and identification of Escherichia coli and Enterobacter aerogenes. Fermentation of lactose is seen by a change in colour of the pH indicator bromothymol blue. TTC is rapidly reduced to red formazan by most coliform organisms except E. coli and Enterobacter aerogenes allowing easy differentiation.