Brilliant Green Agar, Modified 20. Brilliant Green Agar Modified is used for isolating Salmonella from water, sewage, and food-stuffs. It is recommended bythe British Poultry Meat Society for the examination of poultry and poultry products and is mentioned in the LMBG and ISOstandards for foods. The recommended procedures include using complementary selective culture media and techniques toincrease the likelihood of isolating multiple serotypes of Salmonella from samples. The medium is also known as BrilliantGreen Phenol Red Lactose Sucrose Modified Agar in several guidelines.