Oxoid™ MacConkey Agar with Salt is a selective and differential medium designed for the isolation and differentiation of Enterobacteriaceae and other Gram-negative bacteria from clinical, food, and environmental samples, particularly in marine or high-salt conditions. The inclusion of bile salts and crystal violet inhibits the growth of Gram-positive organisms, while lactose and neutral red enable differentiation based on lactose fermentation. The added salt concentration supports the recovery of halotolerant and marine bacteria, making this medium ideal for testing saltwater specimens or saline environments.

Features:

• Selective for Gram-negative organisms — inhibits Gram-positive bacteria.
• Differential for lactose fermentation — lactose fermenters appear pink/red; non-fermenters remain colorless.
• Contains added salt — optimized for halotolerant or marine bacterial growth.
• Convenient pre-poured 90mm plates — consistent quality, ready to use

Applications:

microbiological testing in food, environmental, and marine research laboratories.

Format: 90 mm pre-poured Petri dishes

Pack Size: 10 plates

Download SDS

Oxoid™ MacConkey Agar with Salt is a selective and differential medium designed for the isolation and differentiation of Enterobacteriaceae and other Gram-negative bacteria from clinical, food, and environmental samples, particularly in marine or high-salt conditions. The inclusion of bile salts and crystal violet inhibits the growth of Gram-positive organisms, while lactose and neutral red enable differentiation based on lactose fermentation. The added salt concentration supports the recovery of halotolerant and marine bacteria, making this medium ideal for testing saltwater specimens or saline environments.

Features:

• Selective for Gram-negative organisms — inhibits Gram-positive bacteria.
• Differential for lactose fermentation — lactose fermenters appear pink/red; non-fermenters remain colorless.
• Contains added salt — optimized for halotolerant or marine bacterial growth.
• Convenient pre-poured 90mm plates — consistent quality, ready to use

Applications:

microbiological testing in food, environmental, and marine research laboratories.

Format: 90 mm pre-poured Petri dishes

Pack Size: 10 plates

Download SDS