Tryptone Tellurite Agar Base, 2.5 kg

Tryptone Tellurite Agar was prepared according to the specifications of the Maryland State, Department of Health as a medium for isolation of members of the genus Corynebacterium , particularly in the laboratory diagnosis of diphtheria (1). Pathogenic organisms like Corynebacterium , Streptococci are often responsible for infections in throat. These organisms are also more or less responsible for infecting the nasal cavity (2). Isolation of these organisms is important during diagnosis of fatal infections. Casein enzymic hydrolysate and peptic digest of animal tissue present in the medium provide nitrogenous, carbonaceous compound and trace elements. Dextrose is an energy source. Sodium chloride maintains osmotic equilibrium. Potassium tellurite inhibits gram-negative and most gram-positive bacteria except Corynebacteria and some Streptococci (3). Serum provides additional growth factors for Corynebacterium species. Storage and Shelf-life: Store below 30°C in tightly closed container and the prepared medium at 2 - 8°C. Use before expiry date on the label. References: 1. Albers W. D., 1947, U.S. Naval Med. Bull., 47:33. 2. Collee J. G., Fraser A. G., Marmion B. P., Simmons A. (Eds.), Mackie and McCartney, Practical Medical Microbiology, 1996, 14th Edition, Churchill Livingstone. 3. MacFaddin J. F., 1985, Media for Isolation-Cultivation-Identification-Maintenance of Medical Bacteria, Vol. I, Williams and Wilkins, Baltimore.