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Clostridium Difficile GDH ELISA Assay Kit

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 Product Description

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Clostridium Difficile GDH ELISA Assay Kit:
For Research Use Only
Size:  1x96 wells
Sensitivity:  Cut-Off Control
Incubation Time:  2 hours
Sample Type:  Stool
Sample Size: 250 mg

Intended Use
This Eagle Biosciences Fecal C. Difficile GDH ELISA (enzyme linked immunosorbent assay) Assay Kit is intended for the quantitative and qualitative detection of C. difficile glutamate dehydrogenase 1 (GDH) in feces. The assay is a useful tool as an aid of detection of C. difficile infection.   The Eagle Biosciences Fecal C. Difficile GDH ELISA Assay Kit is for Research Use Only and is not intended for diagnostic or therapeutic purposes.


Clostridium difficile is a gram-positive anaerobe. Infection with C.  difficile causes severe diarrhea and can be fatal if not diagnosed and treated in a timely manner. C. difficile infection is induced in patients by long-term treatment with antibiotics and is commonly found in hospital environment.  It is easily transmitted through contact with infected fecal matter. Accurate testing for toxins proved to be difficult due to assays having low sensitivity. Since all strains of C. difficile produce large amounts of glutamate dehydrogenase, testing for this antigen has proven to be a better screening tool due to its higher negative predictive value.

Assay Principle

This Eagle Biosciences “sandwich” Fecal C. Difficile GDH ELISA is designed, developed and produced for the quantitative and qualitative measurement of GDH in stool specimen. The assay utilizes the microplate-based enzyme immunoassay technique by coating highly purified antibody onto the wall of microtiter wells.

Assay calibrators/controls and fecal specimen are added to microtiter wells of microplate that was coated with a highly purified monoclonal anti-GDH on its wall. During the assay, the GDH Antibody will be bound to the antibody coated plate after an incubation period. The unbound material is washed away and another HRP-conjugated monoclonal antibody which specifically recognizes the protein of GDH is added for further immunoreactions.  After an incubation period, the immunocomplex of “Anti-GDH Capture Antibody – GDH – HRP-conjugated Anti-GDH Tracer Antibody” is formed if GDH is present in the test sample. The unbound tracer antibody and other proteins in buffer matrix are removed in the subsequent washing step. HRP conjugated tracer antibody bound to the well is then incubated with a substrate solution in a timed reaction and then measured in a spectrophotometric microplate reader. The enzymatic activity of the tracer antibody bound to GDH proteins captured on the wall of each microtiter well is directly proportional to the amount of GDH level in each test specimen.


The assay does not cross react to the following organisms: Cryptosoridium parvum, Giardia lamblia, rotavirus and adenovirus.


N. Shetty, M.W.D. Wren, P.G. Coen,   The Journal of Hospital Infection  January 2011 Volume 77, Issue 1. Health Protection Agency Collaborating Centre, University College London Hospitals, London, UK


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20A NW Blvd., Suite 112
Nashua, NH 03063
Email: info@eaglebio.com
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International: +617-419-2019

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