Efficiently isolate and enumerate coliforms in food, animal feed, and environmental samples with Oxoid™ Violet Red Bile Lactose Agar (VRBLA), formulated in accordance with ISO 4832:2006 and ISO/TS 11133-2:2003 standards. This selective medium uses carefully balanced inhibitors—crystal violet, neutral red, and bile salts—to suppress non-target Gram-positive organisms, ensuring accurate coliform detection.

Key Features:

• Selective formulation targets coliforms while inhibiting Gram-positive bacteria
• Visual differentiation: Rapid lactose fermenters (e.g., Escherichia, Klebsiella, Enterobacter) form red-purple colonies with halos. Slow or late fermenters form straw or colourless colonies with greenish halos
• Supports incubation under anaerobic conditions or at >42°C for improved selectivity
• Designed for detecting indicator organisms that signal hygiene, spoilage, or contamination levels

Applications:

Ideal for microbiological analysis in the food industry and environmental testing labs, helping assess food safety and quality by identifying coliform contamination.

Specifications:

• Form: Powder
• Type: Agar medium
• Quantity: 500 g
• Yield: Varies depending on preparation
• Unit Size: Each

Download SDS

Efficiently isolate and enumerate coliforms in food, animal feed, and environmental samples with Oxoid™ Violet Red Bile Lactose Agar (VRBLA), formulated in accordance with ISO 4832:2006 and ISO/TS 11133-2:2003 standards. This selective medium uses carefully balanced inhibitors—crystal violet, neutral red, and bile salts—to suppress non-target Gram-positive organisms, ensuring accurate coliform detection.

Key Features:

• Selective formulation targets coliforms while inhibiting Gram-positive bacteria
• Visual differentiation: Rapid lactose fermenters (e.g., Escherichia, Klebsiella, Enterobacter) form red-purple colonies with halos. Slow or late fermenters form straw or colourless colonies with greenish halos
• Supports incubation under anaerobic conditions or at >42°C for improved selectivity
• Designed for detecting indicator organisms that signal hygiene, spoilage, or contamination levels

Applications:

Ideal for microbiological analysis in the food industry and environmental testing labs, helping assess food safety and quality by identifying coliform contamination.

Specifications:

• Form: Powder
• Type: Agar medium
• Quantity: 500 g
• Yield: Varies depending on preparation
• Unit Size: Each

Download SDS