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Clostridium Difficile Toxin AB Qualitative ELISA Assay Kit

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 Product Description

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Clostridium Difficile Toxin AB Qualitative 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 Toxin A & B ELISA (enzyme linked immunosorbent assay) Assay Kit is intended for the qualitative detection of both C. Difficile Toxin A and Toxin B in feces. The assay is a useful tool as an aid of detection of C. difficile infection. This Eagle Biosciences Fecal C. Difficile Toxin A & B ELISA Assay Kit is for Research Use Only and is not intended for diagnostic or therapeutic purposes.  


Clostridium difficile is a common pathogen and a major cause of infectious diarrhea in hospitalized patients. While most strains produce both Toxin A and Toxin B, some only produce one or the other. These enterotoxins, which are both proinflamatory and cytotoxic, attack the mucosal lining of the intestines. If not identified and treated in a timely fashion, can result in permanent damage to the colon or colitis. This assay employs antibodies specific to both Toxin A and Toxin B.

Assay Principle

This Eagle Biosciences Fecal C. Difficile Toxin A & B ELISA Assay Kit is a “sandwich” ELISA is designed, developed and produced for the qualitative measurement of Toxin A and Toxin B in stool specimen. The assay utilizes the microplate-based enzyme immunoassay technique by coating highly purified antibody onto the wall of microtiter wells.  Controls and extracted fecal specimen are added to microtiter wells of microplate that was coated with a highly purified monoclonal anti-Toxin A and Toxin B on its wall. During the assay, the Toxin A and B Antibodies 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 Toxin A & B is added for further immunoreactions.  After an incubation period, the immunocomplex of “Anti-Toxin A & B Capture Antibody – Toxin A & B – HRP-conjugated Anti-Toxin A & B Tracer Antibody” is formed if Toxin B 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 Toxin A & B proteins captured on the wall of each microtiter well is directly proportional to the amount of Toxin A & B level in each test specimen.


The assay does not cross react to the following: Helicobacter pylori, glutamate dehydrogenase  (GDH)  Cryptosoridium parvum, Giardia lamblia, rotavirus and adenovirus.


  1. Bartlett, J.G. Clinical practice. Antibiotic-associated diarrhea. N Engl J Med. 2002; 346: 334–339
  2. Kelly, C.P. Immune response to Clostridium difficile infection. Eur J Gastroenterol Hepatol. 1996; 8: 1048–1053
  3. Lyerly, David M., Howard C. Krivan and Tracy D. Wilkins. Clostridium difficile: Its disease and toxins.
  4. Borriello, S.P., FE. Barclay, P.J. Reed, A.R. Welch, J.D. Brown, and O.W. Burden. Analysis of latex agglutination test for Clostridium difficile toxin A(D-1) and differentiation between Clostridium difficile toxins A and B, and latex reactive protein. J. Clin Path. 1987. 40:573-580.

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Eagle Biosciences, Inc.
20A NW Blvd., Suite 112
Nashua, NH 03063
Email: info@eaglebio.com
Toll Free: 866-411-8023
International: +617-419-2019

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