Product information

Demi-Fraser Broth Base is used with ferric ammonium citrate for the selective enrichment of Listeria species and is not intended for use in the diagnosis of disease or other conditions in humans. The selective components acriflavine and nalidixic acid are blended into the base powder and the ferric ammonium citrate is added to the tempered broth after sterilization. Demi-Fraser Broth Base, is developed to give improved results for the isolation of Listeria spp. with both traditional and ELISA methods. As with the sister product, Fraser Broth Base, the selective components acriflavine and nalidixic acid are blended into the base powder and the Ferric Ammonium Citrate is added to the tempered broth after autoclaving. This format has been shown to give improved selectivity with pure cultures and food samples.