This medium is recommended for identification of microorganisms by means of nitrate reduction and indole production. It serves a dual purpose of detecting indole production and nitrate reduction in a wide range of microorganisms. Indole Nitrite Medium should not be used for detecting indole production by members of the Enterobacteriaceae. Duplicate tubes of Indole Nitrate Medium may be inoculated and tested for the presence of nitrates or indole. It is available in 5 ml quantity.