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Merck

M0428

Millipore

Middlebrook 7H11 Agar-Basis

suitable for microbiology, NutriSelect® Plus

Synonym(e):

Media for culturing Mycobacteria

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About This Item

UNSPSC-Code:
41171609
NACRES:
NA.85

Sterilität

non-sterile

Qualitätsniveau

Produktlinie

BioChemika

Form

powder

Haltbarkeit

limited shelf life, expiry date on the label

Hersteller/Markenname

NutriSelect® Plus

Lagerbedingungen

protect from light at room temperature

Methode(n)

microbe id | susceptibility testing: suitable
microbiological culture: suitable

pH-Endwert

6.6±0.2 (25 °C)

Anwendung(en)

clinical testing
food and beverages
life science and biopharma
veterinary

microbiology

Eignung

mycobacteria

Allgemeine Beschreibung

Middlebrook 7H11 Agar Base media is used for the isolation, cultivation, and sensitivity testing of Mycobacterium species. This agar base contains many inorganic salts which help the growth of Mycobacteria. Citric acid formed from sodium citrate helps in retaining inorganic cations in solution. Glycerol supplies carbon and energy. The Middlebrook OADC Supplement (M0678) contains oleic acid, bovine albumin, sodium chloride, dextrose and catalase. Oleic acid and other long chain fatty acids are essential for the metabolism of Mycobacteria. Dextrose is an energy source. Catalase neutralizes toxic peroxides. Albumin protects tubercle bacilli from toxic agents. Malachite green partially inhibits other bacteria.

Anwendung

There are two types of solid culture media for the primary isolation of Mycobacteria. Egg-based (Lowenstein’s formulation) and agar-based (Middlebrook formulation)
The latter has the following advantages over the egg-based media

The Middlebrook 7H11 agar base does not liquify easily in the presence of contaminating proteolytic organisms

There is less inactivation of added drugs when egg ingredients are absent

Komponenten

Zusammensetzung (g/L)
Casein-Hydrolysat, enzymatisch, 1.00
Ammoniumsulfat, 0.50
Kaliumphosphat monobasisch, 1.50
Natriumphosphat dibasisch, 1.50
Natriumcitrat, 0.40
Magnesiumsulfat, 0.05
L-Glutaminsäure, 0.50
Eisenammoniumcitrat, 0.04
Pyridoxin, 0.001
Biotin, 0.0005
Malachitgrün, 0.001
Agar, 15.00

Angaben zur Herstellung

Suspend 10.25 g of Middlebrook 7H11 Agar Base in 450 ml of distilled water. Add 2.5 ml of glycerol (Cat. No. 49767). Boil to dissolve the medium completely. Sterilize by autoclaving at 15 lbs. pressure (121°C) for 15 minutes. Cool to 50°C and aseptically add 1 vial Middlebrook OADC Growth Supplement (M0678). Mix thoroughly before dispensing.

Fußnote

We offer two media types: the superior granulated GranuCult® and the cost-efficient powdered NutriSelect® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.

Rechtliche Hinweise

GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany
NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany

Lagerklassenschlüssel

11 - Combustible Solids

WGK

WGK 3

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable


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Artikel

Identifying Mycobacterium species crucial due to varying clinical significance; some pathogenic, others not.

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