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Merck

01869

Hippurate Strips Kit

suitable for microbiology

Synonym(s):

Hippurate Strips

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About This Item

UNSPSC Code:
41171621
NACRES:
NA.85

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technique(s)

microbe id | specific enzyme detection: suitable

application(s)

clinical testing
environmental
food and beverages

microbiology

storage temp.

2-8°C

suitability

Campylobacter spp.
Gardnerella vaginalis
Streptococcus spp.

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Application

Test for identification of hippurate hydrolase activity of group B streptococci, Campylobacter jejuni, Gardnerella vaginalis and other microorganisms.
The test is based on hydrolysis of substrate (sodium hippurate) by the bacterial enzyme hippurate hydrolase and production of benzoic acid and glycine. Glycine produced by this enzymatic reaction is detected after 24 hours incubation in reaction with chromogen (ninhydrine) and the blue-purple substance is produced.

Other Notes

The kit contains 50 Hippurate Strips (Cat. No. 92472) saturated with sodium hippurate and 350 mg Chromogen in 15 ml Diluent (Cat. No. 01875)

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Central nervous system, Respiratory system

Storage Class Code

3 - Flammable liquids

Flash Point(F)

50.0 °F - closed cup

Flash Point(C)

10 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Articles

For microbiologists the most fundamental stain was developed in 1884 by the Danish bacteriologist Hans Christian Gram.

Protocols

Listeria is a public health concern, affecting elderly, pregnant, newborns, and immunocompromised individuals.

Questions

  1. Hello, Is this product suitable to detect if there is any hippurate in our samples? Is it a quantitative test or a qualitative test? Are there any restrictions on sample types?

    1 answer
    1. This kit is used for the detection of hippurate hydrolase, an enzyme produced by a number of pathogenic organisms. Hippurate is the substrate embedded into the test strips. Hippurate hydrolase produced by bacteria will hydrolyze the embedded hippurate in the test strip. One of the resulting by-products, glycine, reacts with the chromogen producing a blue/purple color, indicating a positive test. This is a qualitative test. Tests are limited to cultures taken from samples that have been incubated for at least 24 hours. See the link below to review the protocol: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/398/494/01869dat.pdf

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