BACGro Violet Red Bile Agar with X-GLN / 5kg

BACGroTM Violet Red Bile Agar w. X-GLN (VRBX), when prepared as directed, is intended for the detection and enumeration of Escherichia coli and other coliforms from food and dairy products.

Online purchase is not currently available for BACGro Culture Media Products.
All customers shall contact BACGroTM Culture Media directly via e-mail or phone +1-215-357-3911.


Violet Red Bile Agar with X-GLN contains peptone to provide vitamins and minerals, as well as a carbon and nitrogen source. Yeast extract promotes bacterial growth by supplying B-complex vitamins. Lactose provides a carbohydrate source. Bile salts and crystal violet aid in the inhibition of Gram-positive bacteria. Neutral red is a pH indicator in which lactose-fermenters will produce red colonies and halos (due to bile precipitation). Sodium chloride conserves osmotic balance. X-glucuronide is a chromogenic substrate for β-glucuronidase. Agar is a solidifying agent.
The presence of β-glucuronidase differentiates most E. coli from other coliforms. The formed E. coli colonies are colored blue.

Kit Specifications
Formulation (per Liter)

Peptone 7.0 g

Yeast Extract 3.0 g

Lactose 10.0 g

Bile Salts No. 3 1.5 g

Sodium Chloride 5.0 g

Neutral Red 0.03 g

Crystal Violet 0.002 g

X-Glucuronide 0.1 g

Agar 15.0 g

Total 41.6 g/L

2-30 °C
Citrobacter, Coliform & E.Coli, Pseudomonas spp.
Product Attachments
  • IFU POW8000 Rev 02 Violet Red Bile Agar with X-GLN (VRBX)

Find product documentation under Document Repository