Liofilchem™ Iodine Solution, 10mL

The Liofilchem™ Iodine Solution is a supplement used for the preparation of Tetrathionate Broth Base (Codes 610183, 620183). It facilitates the selective enrichment of Salmonella spp. from food and fecal specimens by inhibiting contaminating flora that lack the enzyme tetrathionate reductase.

Key Features

1. Selective Enrichment:
   • Enhances recovery of Salmonella spp. while inhibiting contaminating flora.
2. Validated for Clinical Use:
   • Tested with standard control strains to ensure reliability.
3. Convenient Packaging:
   • Available in vials containing pre-measured iodine solution for ease of use.

Kit Contents

• 5 or 10 vials of Iodine Solution (10 mL each).

Method Principle

• Tetrathionate Formation:
  • Upon addition of Iodine Solution, tetrathionate is formed in the medium, selectively inhibiting organisms that lack tetrathionate reductase and promoting the recovery of Salmonella spp.

Applications

1. Food Microbiology:
   • Detection and enrichment of Salmonella spp. from raw and processed food products.
2. Clinical Microbiology:
   • Isolation of Salmonella spp. from fecal specimens.
3. Environmental Testing:
   • Monitoring water and environmental samples for Salmonella spp.

Preparation Instructions

1. Prepare the Base Medium:
   • Follow instructions for preparing Tetrathionate Broth Base and cool to 45-50°C.
2. Add Iodine Solution:
   • Aseptically add 1 vial (10 mL) of Iodine Solution to 490 mL of medium.
   • Do not reheat after adding the supplement.
3. Mix and Dispense:
   • Mix thoroughly and pour into sterile containers.
4. Inoculate Quickly:
   • Use the complete medium within 2 hours of supplement addition.

Interpretation of Results

Quality Control

• Appearance:
  • Homogeneous dark brown liquid, clear.
• Microbiological Control:
  • Prepare the medium per label directions and inoculate with control strains.
  • Incubate at 35 ± 2°C for 18-24 hours.

Storage and Shelf Life

• Storage:
  • Store at 2–8°C, protected from light.
  • Can be stored or transported at 18–25°C for 4 days or 35–39°C for 48 hours without affecting performance.
• Shelf Life:
  • Valid until the expiry date indicated on the label.

Advantages

• Highly Selective:
  • Promotes Salmonella recovery while suppressing unwanted flora.
• Convenient:
  • Pre-measured vials simplify preparation and ensure consistency.
• Validated Performance:
  • Reliable results with QC-tested strains.

Warnings and Precautions

1. Iodine Solution is classified as hazardous; consult the Safety Data Sheet (SDS) for safe handling.
2. For in vitro diagnostic use (IVD) only.
3. Handle all microbiological materials as potentially infectious.
4. Dispose of unused or expired product according to local regulations.

Limitations

• The medium must be used within 2 hours of adding the Iodine Solution.
• Do not reheat the medium after supplement addition, as it may compromise performance.

Packaging

References

1. Harvey, R.W.S., and T.H. Price (1976). Isolation of salmonellae using tetrathionate. J. Hyg. Camb. 77:333-339.
2. Kauffman, F. (1935). Erfahrungen mit dem kombinierten Anreicherungsverfahren fur Salmonella bazillen. Ztschr. F. Hyg. 117:26-32.

Why Choose Liofilchem Iodine Solution?

• Proven Reliability: Enhances Salmonella recovery with validated performance.
• Ease of Use: Pre-measured vials simplify preparation for consistent results.
• Wide Applicability: Suitable for food, clinical, and environmental microbiology.