Tetrathonate broth is a selective enrichment broth for the isolation of Salmonella spp. primarily from food and food samples. It can however be used in other applications including for clinical and environmental specimen testing. Salmonella spp. can reduce Tetrathionate and will proliferate in the medium whilst most other enteric organisms are inhibited. Immediately prior to use it is necessary to add 2% Iodine Solution (BM0946 – Supplied with the medium). Once the Iodine Solution has been added the medium should be used immediately and cannot be stored for future use.
NB: As this is an opaque medium, turbidity cannot be used as an indication of growth.