Hardy Diagnostics Violet Red Bile with Glucose Agar (VRBGA), USP is a selective medium recommended for the detection and enumeration of Enterobacteriaceae in food, dairy, and other industrial samples.

VRBGA combines bile salts and crystal violet, which inhibit Gram-positive bacteria, with glucose as a fermentable carbohydrate source to differentiate Enterobacteriaceae. Organisms that ferment glucose produce acid, leading to red or purple colonies surrounded by a zone of precipitated bile, allowing for rapid and reliable identification.

Formulated to meet USP and ISO 21528 standards, this medium is ideal for use in food safety testing, quality assurance, and microbial monitoring programs. Plates are manufactured using optically clear, heavy-duty polystyrene for distortion-free viewing and durability. Each sleeve of plates is packaged in breathable film to prevent condensation while maintaining sterility.

Features and Benefits:
• Recommended for detection and enumeration of Enterobacteriaceae in foods and dairy
• Selective formulation inhibits Gram-positive bacteria using bile salts and crystal violet
• Differential medium distinguishes glucose fermenters by color change and bile precipitation
• USP-compliant and suitable for food, environmental, and pharmaceutical testing
• Optically clear polystyrene ensures distortion-free observation
• Stacking rings allow secure plate stacking and easy handling
• Breathable packaging prevents condensation and excess moisture buildup
• Heavy-duty plate construction minimizes breakage during transport and use