FLUID TETRATHIONATE MEDIUM (as per USP)

Fluid Tetrathionate Medium was originally described by Mueller and found that the medium selectively inhibits coliforms and permit unrestricted growth of enteric pathogens. The medium is now formulated according to FDA, United States Pharmacopoeia, 2009, Compendium of Microbiological Examination of Foods and Standard Methods for the Examination of Water and Wastewater which specify this medium as enrichment medium for Salmonella species. Salmonella is the common causative agent of mild gastroenteritis to typhoid. It is common contaminant in food and other biological products. This medium supports the rejuvenation of Salmonella cells injured by food processing which are incapable of forming colonies on plate, but on injection can cause infection. This medium is recommended by USP for microbial limit tests for pharmaceutical preparations.

an enrichment medium for isolation of Salmonellae from samples contaminated with Salmonellae