Liofilchem™ Sugar Fermentation Test, 30 Tests

The Liofilchem™ Sugar Fermentation Tests are ready-to-use biochemical test systems designed for the differentiation of microorganisms based on carbohydrate fermentation. These tests are widely used in microbiology laboratories for the identification of both Gram-positive and Gram-negative bacteria isolated from clinical and non-clinical samples.

Each test consists of tubes containing desiccated nutrients and a specific carbohydrate substrate, along with a pH indicator (bromocresol purple) that enables clear visual detection of fermentation reactions. This system provides a simple, reliable, and standardized method for evaluating microbial metabolic activity, supporting accurate bacterial identification workflows.

Key Features

• Designed for carbohydrate fermentation testing in bacterial identification
• Suitable for Gram-positive and Gram-negative microorganisms
• Contains bromocresol purple indicator for clear color change (purple → yellow)
• Ready-to-use tube format with desiccated substrates for convenience
• Available for a wide range of carbohydrates (e.g., glucose, lactose, mannitol, xylose)
• Supports clinical, food, and environmental microbiology applications
• Compatible with standard microbiology laboratory procedures
• Reliable performance from Liofilchem™, a trusted microbiology brand

Applications

• Identification and differentiation of bacterial species
• Clinical microbiology diagnostics
• Food microbiology and pathogen testing
• Environmental microbiology analysis
• Teaching and research laboratories
• Quality control and routine microbiological testing

Principle of the Method

The test detects the ability of microorganisms to ferment specific carbohydrates:

• Microorganisms metabolize the carbohydrate substrate
• Acid production lowers the pH of the medium
• The bromocresol purple indicator changes from purple to yellow (positive reaction)
• No color change (remains purple) indicates a negative reaction

This simple colorimetric response enables rapid differentiation of bacterial species based on metabolic characteristics.

Kit Content

• 30 test tubes per kit, each containing:
  • Desiccated nutrients
  • Specific carbohydrate substrate
  • pH indicator (bromocresol purple)
• Special case:
  • Xylose Test includes 30 tubes + 30 xylose discs

Ordering Information 

Technical Specifications

Advantages

The Liofilchem™ Sugar Fermentation Tests provide a standardized and efficient approach to carbohydrate utilization testing. Their ready-to-use format reduces preparation time and variability, while the clear color change ensures easy interpretation of results.

With a wide range of carbohydrate options, these tests allow laboratories to build comprehensive biochemical identification panels, improving diagnostic accuracy and workflow efficiency.

Limitations

• Results should be interpreted alongside additional biochemical, immunological, or molecular tests
• Some organisms may ferment carbohydrates at different rates, requiring careful observation
• pH reversal may occur due to secondary metabolic processes

The Liofilchem™ Sugar Fermentation Tests are reliable and user-friendly tools for bacterial identification through carbohydrate metabolism profiling. With their standardized design, broad applicability, and clear results, they are essential for laboratories involved in clinical diagnostics, food safety, and microbiological research.