Description
Specifications Table
| Product Name | MacConkey HiVeg Agar with CV, NaCl, 0.003% NR and 1.5% Agar |
|---|---|
| Pack Size | 100 gm |
| Form | Powder |
| Grade | Laboratory Grade |
| Application | Selective and differential isolation of Gram-negative bacteria |
Product Description
MacConkey HiVeg Agar is a specialized microbial culture medium designed for the selective isolation and differentiation of Gram-negative bacteria. This vegan formulation replaces traditional animal-derived components with plant-based alternatives, making it ideal for ethical and sustainable laboratory practices. The medium contains crystal violet (CV) and bile salts to inhibit Gram-positive bacteria while allowing Gram-negative organisms like E. coli and Salmonella to thrive. The addition of neutral red (NR) as a pH indicator helps distinguish lactose fermenters from non-fermenters, with colonies appearing pink or colorless based on their metabolic activity.
This agar is widely used in clinical, food, and environmental microbiology labs for routine testing, research, and quality control. Its consistent performance and high purity ensure reliable results in bacterial identification and antibiotic susceptibility testing. Whether you’re a student, researcher, or educator, this medium provides a dependable foundation for your experiments.
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The 1.5% agar concentration provides the optimal gel strength for stable colony growth, while the balanced nutrient composition supports robust bacterial proliferation. The inclusion of NaCl maintains osmotic equilibrium, ensuring accurate microbial behavior under controlled conditions. This medium is particularly useful in educational settings where students learn about bacterial metabolism and selective culture techniques.
For researchers working on antimicrobial resistance studies or food safety protocols, MacConkey HiVeg Agar serves as an essential tool. Its ability to differentiate between lactose fermenters and non-fermenters makes it invaluable in identifying potential pathogens in various samples. The vegan formulation also addresses ethical concerns in modern laboratories while maintaining the same high standards of performance as traditional media.
FAQs
What is the difference between MacConkey Agar and MacConkey HiVeg Agar?
MacConkey HiVeg Agar uses plant-derived peptones instead of animal-derived components, making it suitable for vegan laboratories while maintaining the same selective and differential properties as traditional MacConkey Agar.
How do I prepare MacConkey HiVeg Agar?
Suspend 52 grams of the powder in 1 liter of distilled water, heat to boiling to dissolve completely, then sterilize by autoclaving at 121°C for 15 minutes. Cool to 45-50°C before pouring into sterile Petri dishes.
What bacteria can be isolated using this medium?
This medium selectively isolates Gram-negative bacteria like Escherichia coli, Klebsiella, Enterobacter, and Salmonella while inhibiting most Gram-positive organisms.
How should I interpret the colony colors?
Lactose fermenters like E. coli produce pink to red colonies due to acid production turning the neutral red indicator. Non-lactose fermenters like Salmonella appear colorless or pale.
What is the shelf life of prepared MacConkey HiVeg Agar plates?
Prepared plates should be used within 4 weeks when stored at 2-8°C. Always check for signs of contamination or drying before use.
