Description

Mannitol Salt Agar (MSA) is a selective and differential culture medium used primarily to isolate and identify Staphylococcus species, particularly Staphylococcus aureus. It is widely used in clinical microbiology and food testing.

Mannitol Salt Agar (MSA) is a selective and differential microbiological culture medium used primarily to isolate and identify Staphylococcus species, especially Staphylococcus aureus.

• It contains 7.5% NaCl, making it selective by inhibiting most bacteria other than salt-tolerant staphylococci.

• It includes mannitol and the pH indicator phenol red, making it differential:

  • S. aureus ferments mannitol → produces acid → yellow colonies/yellow media.

  • Non-mannitol-fermenting staphylococci remain pink/red.

Reference Links

https://www.ncbi.nlm.nih.gov/books/NBK557696/

🧫 What Is Mannitol Salt Agar (MSA)?

MSA is designed to:

• Select for halophilic (salt-tolerant) bacteria, especially Staphylococci.

• Differentiate species based on their ability to ferment mannitol, a type of sugar alcohol.

• Medical Mannitol Salt Agar (MSA) Media – Microbiology Culture Medium in Kenya

  The Mannitol Salt Agar (MSA) Media supplied by Doctor Ally East Africa is a selective and differential microbiological culture medium used for the isolation, cultivation, and identification of Staphylococcus species, particularly Staphylococcus aureus. The medium contains a high concentration of sodium chloride that inhibits the growth of most other bacteria while allowing salt-tolerant organisms to grow.

  Widely used in hospital laboratories, diagnostic centers, research institutions, universities, food testing laboratories, and microbiology laboratories across Kenya and East Africa, Mannitol Salt Agar is an essential culture medium for bacteriological investigations and microbial analysis.

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  🔬 What is Mannitol Salt Agar Media?

  Mannitol Salt Agar (MSA) is a selective and differential culture medium formulated to isolate and differentiate staphylococci based on their ability to ferment mannitol.

  The medium contains:

  • Mannitol as a fermentable carbohydrate
  • Sodium chloride (7.5%) as a selective agent
  • Phenol red as a pH indicator
  • Peptones and nutrients to support bacterial growth

  When mannitol is fermented, the medium changes color from red to yellow, helping microbiologists identify mannitol-fermenting bacteria.

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  🔍 Product Overview

  

  

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  Key Features of Mannitol Salt Agar Media

  ✔ Selective medium for isolation of Staphylococcus species
  ✔ Differential medium for mannitol fermentation testing
  ✔ High sodium chloride concentration inhibits unwanted bacterial growth
  ✔ Reliable performance for microbiological investigations
  ✔ Easy preparation and laboratory use
  ✔ Supports quality control and diagnostic testing
  ✔ Suitable for research, clinical, and educational laboratories
  ✔ Consistent and accurate microbial culture results

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  Laboratory Applications

  Mannitol Salt Agar is commonly used for:

  • Isolation of Staphylococcus species
  • Identification of Staphylococcus aureus
  • Clinical microbiology testing
  • Food microbiology analysis
  • Pharmaceutical microbiology quality control
  • Academic and research laboratory studies

  The medium is frequently used during investigations associated with infections caused by Staphylococcal Infection, wound infections, and healthcare-associated bacterial contamination.

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  Benefits for Laboratories in Kenya

  ✔ Supports accurate microbial identification
  ✔ Enhances diagnostic laboratory efficiency
  ✔ Helps differentiate pathogenic and non-pathogenic staphylococci
  ✔ Suitable for routine microbiological testing
  ✔ Reliable performance for educational and research applications

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  Technical Specifications (May Vary by Manufacturer)

  • Product Type: Mannitol Salt Agar (MSA) Media
  • Format: Dehydrated powder or prepared plates
  • Application: Microbiological culture and bacterial isolation
  • Selective Agent: Sodium chloride (7.5%)
  • Indicator: Phenol red
  • Storage: Store according to manufacturer instructions
  • Usage: Clinical, research, industrial, and educational laboratories

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  Why Buy Mannitol Salt Agar Media from Doctor Ally East Africa?

  • Trusted laboratory consumables supplier in Kenya
  • High-quality microbiology culture media
  • Competitive pricing for laboratories and institutions
  • Reliable supply across East Africa
  • Fast delivery within Nairobi and nationwide
  • Professional support for laboratory procurement needs

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  Order Mannitol Salt Agar Media in Kenya Today

  Doctor Ally East Africa supplies reliable Mannitol Salt Agar Media in Kenya for microbiology laboratories, research facilities, universities, hospitals, and diagnostic centers.

  📞 Contact us today +254704328523 for pricing, bulk orders, laboratory consumables, and nationwide delivery.

🔑 Key Features of Mannitol Salt Agar:

1. Selective Medium

• Contains 7.5% sodium chloride (NaCl):

  • Inhibits most bacteria (especially Gram-negative and many Gram-positive organisms).

  • Selects for salt-tolerant bacteria, mainly Staphylococcus spp.

2. Differential Medium

• Contains:

  • Mannitol (a fermentable sugar)

  • Phenol red (a pH indicator)

• Differentiates mannitol fermenters from non-fermenters:

  • Mannitol fermenters (e.g., S. aureus): Produce acid → lower pH → phenol red turns yellow.

  • Non-fermenters (e.g., S. epidermidis): No acid → medium stays red or pink.

3. Color Change Indicator

• Phenol red turns:

  • Yellow in acidic conditions (mannitol fermentation).

  • Red in neutral or basic conditions (no fermentation).

4. Nutrient Support

• Peptones and beef extract provide general nutrients for bacterial growth.

🦠 Typical Reactions on MSA:

🎯 Common Applications:

• Clinical microbiology: To identify and differentiate Staphylococcus aureus from other staphylococci.

• Food and water testing: To check for contamination by S. aureus.

• Skin flora studies: Useful for identifying colonization by salt-tolerant bacteria.

✅ Summary:

Mannitol Salt Agar is a:

• Selective medium (for salt-tolerant bacteria like Staphylococcus).

• Differential medium (based on mannitol fermentation).

• Valuable in identifying S. aureus, which turns the medium yellow due to acid production.