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  Top » Catalog » AG-1224-500 grams

TRYPTICASEIN SOY BROTH (TSB) EUROPEAN PHARMACOPOEIA

 [AG-1224-500 grams]
 37.33 

Description

 

For general laboratory use and to cultivate fastidious microorganisms

FORMULA IN g/l

Pancreatic Digest of Casein

17.00

Glucose Monohydrate

2.50

Sodium Chloride

5.00

Dipotassium Phosphate

2.50

Papaic Digest of Soy Bean

3.00

 

 

Final pH 7.3 ± 0.2 at 25ºC

 

PREPARATION

Suspend 30 grams of the medium in one liter of distilled water. Mix well and dissolve by heating with frequent agitation. Boil for one minute until complete dissolution. Dispense into appropriate containers and sterilize in autoclave at 121°C for 15 minutes. Larger quantities may require a longer sterilization time, but the temperature should not be increased. The prepared medium should be stored at 2-8°C. The color is clear amber.

The dehydrated medium should be homogeneous, free-flowing and light beige in color. If there are any physical changes, discard the medium.

USES

TRYPTICASEIN SOY BROTH is a medium very rich in nutrients for general use in microbiological laboratories. It supports the abundant growth of fastidious organisms such as pneumococci, streptococci, Neisseriae, etc. 

The medium is used frequently in many procedures of diagnostic research or microbiology. For example, it is used for the isolation and sensitivity testing of all types of pathogens, and for the production of antigens for agglutination and serological tests. 

Containing two peptones as rich nitrogen sources, obtained by the enzymatic hydrolysis of Casein and Soy proteins, this medium supports the growth of a great variety of microorganisms, including fastidious aerobes and anaerobes. Soy peptone also contains natural sugars which promote bacterial growth. Glucose is a carbohydrate and carbon source. Sodium chloride supplies essential electrolytes for transport and osmotic balance, and Dipotassium phosphate is a buffering agent. 

The European Pharmacopoeia recommends this medium in Paragraph 2.6.13 “Microbiological examination of non-Sterile products” for the test of specified microorganisms, as a pre-enrichment medium for sample preparations for testing of products. Inoculate and incubate at 30-35ºC and observe after 18 - 24 hours. 

In Paragraph 2.6.12 “Microbiological examination of non – sterile products: Microbial enumeration test”, it is indicated to inoculate and incubate at 30-35ºC ≤ 3 days for the total count of aerobics ≤100 cfu/ml. 

For a growth promotion test of aerobes, anaerobes and fungi, inoculate the medium with a small number of microorganisms: no more than 100 cfu of Aspergillus brasiliensis  ATCC 16404, Bacillus subtilis ATCC 6633 and Candida albicans ATCC 10231. Incubate for no more than 3 days in the case of bacteria, and no more than 5 days in the case of fungi. 

If desired, antibiotics can easily be incorporated as well as other supplements or inhibitory agents.

Sterility Test: Incubate portions of the media for 14 days. If no growth of microorganisms occurs, the product is sterile. 

 

MICROBIOLOGICAL TEST

The following results were obtained in the performance of the medium from type cultures after incubation at a temperature of 30-35ºC and observed after 18-24 hours. 

Microorganisms

Growth

Inoculum cfu

Recovery

Brucella abortus ATCC 4315

Good

102-103

≥50

*Staphylococcus aureus ATCC 6538

Good

100

≥70

Escherichia coli ATCC 25922

Good

102-103

≥70

Escherichia coli ATCC 8739

Good

102-103

≥70

Enterobacter aerogenes ATCC 13048

Good

102-103

≥70

**Candida albicans ATCC 10231

Good

100

≥70

Streptococcus pyogenes ATCC 19615

Good

102-103

≥70

Streptococcus pneumoniae ATCC 6303

Good

102-103

≥70

*Pseudomonas aeruginosa ATCC 9027

Good

100

≥70

Salmonella typhimurium ATCC 14028

Good

102-103

≥70

* Bacillus subtilis ATCC 6633

Good

100

≥70

**Aspergillus brasiliensis ATCC 16404

Good

100

≥70

*According to European Pharmacopeia. Total recount of aerobiosis ≤100 cfu/ml. Incubate at 30-35ºC for ≤3 days.

** According to European Pharmacopeia. Total recount of yeast and molds ≤100 cfu/ml. Incubate at 30-35ºC for ≤5 days.

 

BIBLIOGRAPHY

European Pharmacopoeia.7.0

Gibbons and McDonald. J. Bacteriol., 80:164. 1960. Havens and Benham. A. Med. Tech., 23:305. 1957.

Muey and Edward. Proc. Soc. Exper. Biol. and Med., 97:550. 1958. Steward and Kelly. J. Bacteriol., 77:101. 1959.

MacFaddin, J.D. 1985. Media for isolation-cultivation-identification-maintenance of medical bacteria, p. 797. vol. 1. Williams & Wilkins, Baltimore, MD.

 

STORAGE

Once opened keep powdered medium closed to avoid hydration.

 

Mfg Info

Manufacturer Info
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