Lactobacillus Selection HiVeg™ Broth Base

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MV1166
For the selective isolation, cultivation and enumeration of Lactobacilli from food.


Intended Use

Lactobacillus Selection HiVeg Agar / Broth Base is recommended for isolation and enumeration of Lactobacilli from foods.

Product Profile

Vegetable based (Code MV) Animal based (Code M)
Product Type MV1180/MV1166 M1180/M1166
Base Ingredient HiVeg hydrolysate Casein enzymic hydrolysate
Reconstitution (MV1180) : 84.7 g/l
Reconstitution (MV1166) : 69.7 g/l
Quantity on preparation (500g) (MV1180) : 5.90 L
Quantity on preparation (500g) (MV1166) : 7.17 L
pH (25°C) (MV1180) : 5.5 ± 0.2
pH (25°C) (MV1166) : 5.4 ± 0.2
Supplement : Glacial acetic acid
Sterilization : Boiling (DO NOT AUTOCLAVE) / 118°C / 15 minutes (if medium is to be stored).
Storage : Dry Medium and Prepared Medium 2 - 8°C.

Composition** :

Ingredients MV1180 Grams/Litre MV1166 Grams/Litre
HiVeg hydrolysate 10.00 10.00
Yeast extract 5.00 5.00
Dextrose 20.00 20.00
Sodium acetate 25.00 25.00
Monopotassium hydrogen phosphate 6.00 6.00
Ammonium citrate 2.00 2.00
Polysorbate 80 1.00 1.00
Magnesium sulphate 0.575 0.575
Manganese sulphate 0.12 0.12
Ferrous sulphate 0.034 0.034
Agar 15.00
Final pH (at 25°C) 5.5 ± 0.2 5.4 ± 0.2

** Formula adjusted, standardized to suit performance parameters

Directions :

Suspend 84.7 grams of MV1180 or 69.7 grams of MV1166 in 1000 ml distilled water containing 1.32 ml glacial acetic acid. Heat with frequent stirring. Boil for 1 - 2 minutes to dissolve the medium completely. DO NOT AUTOCLAVE. If storage is necessary, autoclave at 12 lbs pressure (118°C) for 15 minutes.

Principle and Interpretation :

These media are prepared by using HiVeg hydrolysate in place of Casein enzymic hydrolysate which make the medium free of BSE/TSE risks. Lactobacillus Selection HiVeg Agar Base is used for isolation and enumeration of Lactobacilli. Lactobacillus Selection HiVeg Broth Base may be used for isolation and cultivation of Lactobacilli. These media are the modifications of the media developed by Rogosa et al (1, 2) as a selective media for isolation and enumeration of Lactobacilli from oral, faecal specimens (3), food (4) and dairy products (5).

HiVeg hydrolysate, yeast extract and dextrose are the nitrogen and carbon sources. Polysorbate 80 provides fatty acids required for the metabolism of Lactobacilli. Ammonium citrate and sodium acetate inhibit many organisms, including Streptococci, moulds and also restrict swarming. Addition of acetic acid lowers the pH which is inhibitory to many microorganisms but favours the growth of Lactobacilli on the agar medium. Lactobacilli appear as large, white colonies.

Quality Control :

Appearance of Powder
Yellow coloured, may have slightly greenish tinge, homogeneous, free flowing powder.

Gelling
Firm, comparable with 1.5% Agar gel of MV1180.

Colour and Clarity
Yellow coloured, slightly opalescent gel forms in petri plates, clear to slightly opalescent solution in tubes.

Reaction
Reaction of 8.47% w/v aqueous solution of MV1180 is pH 5.5 ± 0.2 at 25°C.

Cultural Response

Reaction of 6.97% w/v aqueous solution of MV1166 is pH 5.4 ± 0.2 at 25°C.

Cultural characteristics observed after an incubation at 35-37°C for 48 hours, in presence of 3 - 5% CO2.

Organisms (ATCC) Inoculum (CFU) Growth Recovery
Lactobacillus acidophilus (4356) 102–103 luxuriant >70%
Lactobacillus plantarum (8014) 102–103 luxuriant >70%
Lactobacillus casei (9595) 102–103 luxuriant >70%
Enterococcus faecalis (29212) 102–103 inhibited 0%
Proteus vulgaris (13315) 102–103 inhibited 0%
More Information
Product Name Lactobacillus Selection HiVeg™ Broth Base
SKU MV1166
Product Type HiVeg™
Physical Form Powder
Origin Animal Free (Veg)
Packaging type HDPE
References 1.Balows A., Truper H. G., Dworkin M., Harder W., Schleifer K. H., (Eds.), The Prokaryotes, 2nd Edi, 1992, Springer-Verlag2.Wiseman R. F, Sarles W. B, Benton D. A, Harper A. E and Elvehjem C.A., 1956, J. Bacteriol., 72:723.3.Ellis R. F. and Sarles W. B., 1958, J. Bacteriol., 75:272.4.Rogosa M. and Sharpe M. E., 1960, J. Gen. Microbiol., 23:1975.Downes F. P. and Ito K., (Eds.), 2001, Compendium of Methods for the Microbiological Examination of Foods, 4th Ed.,American Public Health Association, Washington, D.C.6.Wehr H. M. and Frank J. H., 2004, Standard Methods for the Microbiological Examination of Dairy Products, 17th Ed.,APHA Inc., Washington, D.C.7.Rogosa M., Mitchell J. A and Wiseman R. F., 1951, J. Bacteriol.,62:132.8.Rogosa M., Mitchell J. A and Wiseman R. F., 1951, J. Dental Res., 30:682.9.Sabine D. B. and Vaselekos J., 1965, Nature, 206:960.10.MacFaddin J.F., 1985, Media for Isolation-Cultivation-Identification-Maintenance of Medical Bacteria, Vol.1, Williamsand Wilkins, Baltimore.
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