Violet Red Bile Glucose Agar HDx CRITERION – 2L (C7270)

Violet Red Bile Glucose Agar (VRBGA) is a selective differential medium designed for the detection and enumeration of Enterobacteriaceae in food, dairy products, and environmental samples. This CRITERION HDx formulation provides reliable performance for quality control laboratories requiring consistent, reproducible results in microbial testing applications. The medium inhibits gram-positive organisms while allowing gram-negative, glucose-fermenting bacteria to produce characteristic red-purple colonies with bile precipitation zones.

• Format: Dehydrated culture media in 2-liter bottle for convenient bulk preparation
• Selective agents: Crystal violet and bile salts inhibit gram-positive microorganisms
• Differential indicator: Neutral red detects glucose fermentation via acid production
• Applications: Enumeration of Enterobacteriaceae per ISO 21528 and FDA BAM methods
• Brand: CRITERION by Hardy Diagnostics – trusted for quality and lot-to-lot consistency
• Storage: Store capped at 2-25°C in a dry environment; refer to product label for expiration