MacConkey Agar – 500g Dehydrated Culture Media

MacConkey Agar is a widely used selective and differential medium for the cultivation and identification of Gram-negative enteric bacteria such as E. coli, Salmonella, and Shigella. It distinguishes lactose fermenters (which form pink/red colonies) from non-lactose fermenters (which appear colorless), making it essential for microbiological diagnostics in clinical, environmental, and food microbiology labs.

The medium contains bile salts and crystal violet to inhibit Gram-positive organisms, while neutral red serves as a pH indicator to highlight acid production from lactose fermentation.

Key Features

• Selective for Gram-negative organisms

• Differentiates lactose fermenters from non-fermenters

• High clarity for easy colony interpretation

• Ideal for clinical, food, and water microbiology

• Easy-to-prepare dehydrated form

• Conforms to ISO 11133 and ISO 9001:2015 standards

Specifications

• Composition: Peptones, bile salts, lactose, crystal violet, neutral red, agar

• Form: Dehydrated powder

• Net Weight: 500 grams

• Yield: Approx. 8–10 liters of prepared media

• pH: 7.1 ± 0.2 at 25°C

• Shelf Life: 2 years from manufacturing

• Storage: Store in a cool, dry place (10–30°C)

• Sterilization: Autoclave at 121°C for 15 minutes

Applications

• Identification of enteric bacteria

• Stool culture analysis

• Food and water testing

• Pathogen screening in clinical microbiology