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Description
Fraser BrothFraser Broth Fraser Broth Base is a liquid medium used for the selective enrichment of Listeria spp. This broth was first described by Fraser and Sperber, and is utilized with a Ferric Ammonium Citrate supplement for the rapid detection of Listeria from food and environmental samples. Tryptose, Beef Extract, and Yeast Extract provide nutrients like amino acids, peptides, carbohydrates, and vitamins for bacterial growth. Esculin is the main energy
Fraser Broth
Fraser Broth Base is a liquid medium used for the selective enrichment of Listeria spp. This broth was first described by Fraser and Sperber, and is utilized with a Ferric Ammonium Citrate supplement for the rapid detection of Listeria from food and environmental samples. Tryptose, Beef Extract, and Yeast Extract provide nutrients like amino acids, peptides, carbohydrates, and vitamins for bacterial growth. Esculin is the main energy source. Sodium Chloride provides essential electrolytes and maintains osmotic equilibrium. Disodium Phosphate and Monopotassium Phosphate act as pH buffers. Lithium Chloride, Nalidixic Acid, and Acriflavine are selective agents for Listeria growth. All members of the Listeria spp. hydrolyze Esculin to 6,7-dihydroxycoumarine. This compound reacts with Ferric Ammonium Citrate, thus resulting in the blackening of the medium. There is a choice of 3 sizes - 500g, 2kg, and 10kg.
PREPARATION: Mix 55 grams of the medium in one liter of purified water until evenly dispersed. Distribute and autoclave at 121°C for 15 minutes. Cool to room temperature. Aseptically add 10mL of Fraser Broth Supplement.
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4.5 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 3
Bag not as described
Size: One Size, Color: Dark Cappuccino, Size: One Size, Color: Dark Cappuccino
Very cute bag, but not as described in picture.
The bag I received is much smaller and does not come with additional coin purse.
Disappointed.
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Reviewed in the United States on October 10, 2025
★★★★★ 1
Not the same bag
Size: One Size, Color: Dark Cappuccino, Size: One Size, Color: Dark Cappuccino
The item I received appears to be a smaller version of the bag without the small wallet that should be included. Do not buy it, and save yourself the trouble of having to return it.
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Reviewed in the United States on August 14, 2025
★★★★★ 3
Devuelta
Size: One Size, Color: Black
Muy pequeña
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Reviewed in the United States on September 15, 2025
★★★★★ 1
Not worth the price
Size: Medium, Color: Dark Cappuccino
Item was gifted for Christmas. Within 3 weeks stitching was coming out of the straps.
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Reviewed in the United States on January 12, 2026
★★★★★ 5
Positive
Size: Medium, Color: Dark Cappuccino
The dark cappuccino brown is pretty. This is a favorite just because of the color of the tote. The inside lining color makes it easy to find items.
I like it so much I ordered the black one.
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Reviewed in the United States on December 28, 2025
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