Tryptone Soya Broth w/ Phenol red is a general purpose medium used for cultivation of a wide variety of microorganisms and recommended for sterility testing of moulds and lower bacteria. It facilitates easy identification of growth due to utilization of sugar indicated by colour change and turbidity. This medium therefore can be used for cultivation as well as for sterility testing.
1. The United States Pharmacopoeia / National Formulary, 1995, 23/18, The United States Pharmacopeial Convention Inc.,Rockville, MD.2.Indian Pharmacopeia, 1996, Govt. of India, Ministry of Health and Family Welfare, New Delhi, India.