Listeria Recovery and Enrichment Broth (LREB)Listeria Recovery and Enrichment Broth (LREB) combines nutritional components with additional ingredients that are necessary to selectively improve recovery and growth of Listeria. The selective agents present in LREB have been optimized to efficiently inhibit competing normal bacterial flora without affecting the growth of Listeria species. LREB is formulated for buffering capacity to ensure growth in a variety of matrices. Formula Resources