Palcam Broth is used for the selective enrichment of Listeria spp. from food and environmental samples. Mannitol fermenting species of Listeria give the broth a yellow color due to the Phenol red. Lithium Chloride provides selectivity to Palcam Broth due to the high salt tolerance of Listeria spp. Most gram-negative and gram-positive bacteria are suppressed by the addition of Polymixin B, Acriflavin, Ceftazimide to the cooled medium.