Handbook of Microbiological Media, Fourth Edition part 87 is an invaluable reference for every medical, veterinary, diagnostic, and academic laboratory, and now in its fourth edition, it is even more complete. This edition carries on the tradition of CRC Press handbook excellence, listing the formulations, methods of preparation, and uses for more than 7000 microbiological media. With 1500 more entries than any previous edition, the handbook includes both classic and modern media used for the identification, cultivation, and maintenance of diverse bacteria, archaea, and fungi | Hoyle Medium Base 855 Preparation of Medium Add components except ethanol solution to distilled deionized water and bring volume to . Mix thoroughly. Distribute into tubes in volumes. Autoclave for 15 min at 15 psi pressure-121 C. Cool to 25 C. Aseptically add of sterile ethanol solution to each tube. Mix thoroughly. Use For the cultivation of Acetobacter species. Hoyle Medium Composition per Lab Lemco Horse blood Tellurite pH at 25 C Source This medium is available as a premixed powder from Oxoid Unipath. Horse Blood Laked Composition per Horse blood Preparation of Horse Blood Laked Add blood to a sterile polypropylene bottle. Freeze overnight at -20 C. Thaw at 8 C. Refreeze at -20 C. Thaw again at 8 C. Tellurite Solution Composition per Preparation of Tellurite Solution Add K2TeO3 to distilled de-ionized water and bring volume to . Mix thoroughly. Filter sterilize. Caution Potassium tellurite is toxic. Preparation of Medium Add components except laked horse blood and tellurite solution to distilled deionized water and bring volume to . Mix thoroughly. Gently heat and bring to boiling. Autoclave for 15 min at 15 psi pressure-121 C. Cool to 50 C. Aseptically add sterile laked horse blood and sterile tellurite solution. Mix thoroughly. Pour into sterile Petri dishes or distribute into sterile tubes. Use For the isolation and differentiation of Corynebacterium diphthe-riae strains. This medium permits very rapid growth of all types of Corynebacterium diphtheriae so that diagnosis is possible after 18 hours incubation. Hoyle HiVeg Medium Base Composition per liter Plant Plant Horse blood laked . Tellurite pH at 25 C Source This medium without tellurite solution and laked blood is available as a premixed powder from