Tryptose Agar, HiVeg™

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SKU:
MV538
Recommended for isolation, cultivation and differentiation primarily of Brucella, but also of Streptococci, Pneumococci, Meningococci and other pathogenic microorganisms.


Intended Use

Recommended with or without the addition of blood or other substances for the isolation, cultivation and differentiation primarily of Brucella, but also of Streptococci, Pneumococci, Meningococci and other pathogenic microorganisms.

Composition

Ingredients g/L
HiVeg™ hydrolysate No. 1 20.000
Dextrose (Glucose) 1.000
Sodium chloride 5.000
Agar 15.000
Final pH (at 25°C) 7.2±0.2

Formula adjusted, standardized to suit performance parameters

Directions

Suspend 41.0 grams in 1000 ml purified/distilled water. Heat to boiling to dissolve the media completely. Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes. Cool to 45-50°C.For blood media, aseptically add 5% v/v sterile defibrinated blood. Mix well and pour into sterile Petri plates.

Principle And Interpretation

Huddleson used Tryptose media for the isolation of Brucella species from man (1). Tryptose containing media, rather than the conventionally used meat infusion media have been used for the enumeration and isolation of Brucella species (2,3). Tryptose Agar, HiVeg™ is prepared by completely replacing animal based peptone with vegetable peptones to avoid BSE/ TSE risks associate with animal peptones. Tryptose Agar is also recommended by APHA (4) and FDA (5). This medium can be used as general purpose media for cultivation of wide variety of organisms. It can also be supplemented with defibrinated blood (sheep, horse) to prepare blood agar for the isolation of fastidious organisms like Brucella. Dextrose is the source of energy. HiVeg™ hydrolysate No. 1 serves as nitrogen source while sodium chloride maintains osmotic equilibrium. Blood Agar may be prepared by adding 5%v/v sterile defibrinated blood to molten sterile Tryptose Agar, HiVeg™ at 50°C.

Type of specimen

Food samples

Specimen Collection and Handling

For food and dairy samples, follow appropriate techniques for sample collection and processing as per guidelines (6) After use, contaminated materials must be sterilized by autoclaving before discarding.

Warning and Precautions

Read the label before opening the container. Wear protective gloves/protective clothing/eye protection/face protection. Follow good microbiological lab practices while handling specimens and culture. Standard precautions as per established guidelines should be followed while handling specimens. Safety guidelines may be referred in individual safety data sheets.

Limitations

  • All presumptive anaerobic organisms must be identified by confirmatory test.

Performance and Evaluation

Performance of the medium is expected when used as per the direction on the label within the expiry period when stored at recommended temperature.

Quality Control

Appearance: Cream to yellow homogeneous free flowing powder

Gelling

Firm, comparable with 1.5% Agar gel

Colour and Clarity of Prepared Medium

Basal Medium: Yellow coloured, clear to slightly opalescent gel. With addition of 5% v/v sterile defibrinated blood, cherry red coloured opaque gel forms in Petri plates.

Reaction

Reaction of 4.1% w/v aqueous solution at 25°C. pH: 7.2±0.2

pH

7.00-7.40

Cultural Response

Cultural characteristics observed after an incubation at 35-37°C for 48-72 hours with added 5% v/v sterile defibrinated blood in presence of 10% Carbon dioxide (CO2).

Organism Growth
Brucella melitensis ATCC 4309 good-luxuriant
Brucella suis ATCC 4314 good-luxuriant
Streptococcus pneumoniae ATCC 6303 good-luxuriant
Streptococcus pyogenes ATCC 19615 good-luxuriant

Storage and Shelf Life

Store below 10-30°C in a tightly closed container and the prepared medium at 2-8°C. Use before expiry date on the label. On opening, product should be properly stored dry, after tightly capping the bottle in order to prevent lump formation due to the hygroscopic nature of the product. Improper storage of the product may lead to lump formation. Store in dry ventilated area protected from extremes of temperature and sources of ignition. Seal the container tightly after use. Product performance is best if used within stated expiry period.

Disposal

User must ensure safe disposal by autoclaving and/or incineration of used or unusable preparations of this product. Follow established laboratory procedures in disposing of infectious materials and material that comes into contact with sample must be decontaminated and disposed of in accordance with current laboratory techniques (6,7).

More Information
Product Name Tryptose Agar, HiVeg™
SKU MV538
Product Type HiVeg™
Physical Form Powder
Origin Animal Free (Veg)
Packaging type HDPE
References 1. Huddleson I. F., 1943, Brucellosis in man and animals, rev., Ed., The Commonwealth Fund, New York, N.Y.
2.Ruiz Castañeda M., 1947, Proc. Soc. Exp. Biol. Med., 64:114.
3.Huddleson I. F., 1939, Brucellosis in Man and Animals, Oxford University Press, Oxford, England.
4.Downes F. P. and Ito K., (Ed.), 2001, Compendium of Methods for the Microbiological Examination of Foods. 4th Ed.American Public Health Association, Washington, D.C.
5.U.S. Food and Drug Administration, 1995, Bacteriological Analytical Manual, 8th Ed., AOAC International, Gaithersburg,Md.
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