27048

Christensen′s Urea Agar

suitable for microbiology, NutriSelect^® Basic

• Synonym(s): Urea Agar Base acc. to Christensen, Urea Test Agar
• UNSPSC Code: 41171606
• NACRES: NA.74

Properties

• agency: according to GB 4789.4-2016; according to ISO 10273:2017; according to ISO 19250:2010; according to ISO 6579-1:2017
• Quality Level: 200
• sterility: non-sterile
• product line: BioChemika
• form: powder
• shelf life: limited shelf life, expiry date on the label
• composition: agar, 12 g/L ; gelatine peptone, 1 g/L ; D(+)-glucose, 1 g/L ; phenol red, 0.012 g/L ; potassium dihydrogen phosphate, 2 g/L ; sodium chloride, 5 g/L
• manufacturer/tradename: NutriSelect^® Basic
• technique(s): microbe id | specific enzyme detection: suitable; microbiological culture: suitable
• final pH: 6.8±0.2 (25 °C)
• application(s): clinical testing; environmental; food and beverages; microbiology
• suitability: nonselective and differential for Enterobacter spp.; nonselective and differential for Escherichia coli; nonselective and differential for Klebsiella spp.; nonselective and differential for Proteus spp.; nonselective and differential for Yersinia spp.; nonselective and differential for coliforms

Description

Application

For the differentiation of urea-metabolizing microorganisms. Weak urease producers such as klebsiella, enterobacter etc. can also be differentiated. Yersinia pseudotuberculosis (urea positive) from Yersinia pestis (urea negative) acc. to Thal and Chen (1955).

Preparation Note

Dissolve 21 g in 950 ml distilled water. Sterilize by autoclaving at 121°C for 15 minutes. After cooling to 50°C, add aseptically 50ml (10 vials) sterile filtered 40% urea solution (Cat. No. 08582) and let cool as slants.

Other Notes

Screening of enteric pathogens from stool specimens

Footnote

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.

Legal Information

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

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

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Gloves, type N95 (US)