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Multimycotoxin dipstick enzyme immunoassay applied to wheat

E Schneider1, E Usleber, E Märtlbauer

  • 1Institute for Hygiene and Technology of Food of Animal Origin, Veterinary Faculty, University of Munich, Germany.

Food Additives and Contaminants
|May 1, 1995
PubMed
Summary

A new visual dipstick immunoassay enables simultaneous detection of five mycotoxins, including aflatoxin B1 and zearalenone. This method offers rapid, sensitive mycotoxin screening in food matrices like wheat.

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Mycotoxin research·2013

Area of Science:

  • Food safety and analytical chemistry
  • Development of rapid diagnostic tools
  • Mycotoxin analysis

Background:

  • Mycotoxins pose significant risks to food safety and human health.
  • Simultaneous detection of multiple mycotoxins is crucial for comprehensive risk assessment.
  • Existing methods for mycotoxin detection can be time-consuming and require specialized equipment.

Purpose of the Study:

  • To develop a novel membrane-based visual dipstick enzyme immunoassay.
  • To enable simultaneous detection of up to five common mycotoxins.
  • To provide a rapid and accessible method for mycotoxin screening.

Main Methods:

  • Antibodies against aflatoxin B1 (AFB1), T-2 toxin (T-2), 3-acetyldeoxynivalenol (3-AcDON), roridin A (RA), and zearalenone (ZEA) were immobilized on a dipstick membrane.

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  • A competitive enzyme immunoassay format was employed using toxin-horseradish peroxidase conjugates.
  • Visual assessment of color development suppression indicated positive results.

    • Main Results:

    • The assay successfully detected AFB1, T-2, 3-AcDON, RA, and ZEA simultaneously.
    • Visual detection limits in buffer were as low as 2 ng/ml for AFB1 and 5 ng/ml for T-2 and ZEA.
    • In artificially contaminated wheat, detection limits ranged from 30 ng/g for AFB1 to 600 ng/g for 3-AcDON.

    Conclusions:

    • The developed visual dipstick immunoassay is a promising tool for rapid, simultaneous mycotoxin detection.
    • The assay demonstrates good sensitivity and applicability to real food samples after simple extraction.
    • This method offers a cost-effective and user-friendly alternative for mycotoxin screening in quality control laboratories.